Home / 103,493,213,998.70-155,239,820,998.05-85,826,839,700.30

Finding the Fourth Proportional to 103,493,213,998.70, 155,239,820,998.05 and 85,826,839,700.30

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Solution

The fourth proportional to 103,493,213,998.70, 155,239,820,998.05 and 85,826,839,700.30 is: 128,740,259,550.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,493,213,998.70 : 155,239,820,998.05 = 85,826,839,700.30 : x
  2. Step 2: Convert to fraction form
    103,493,213,998.70/155,239,820,998.05 = 85,826,839,700.30/x
  3. Step 3: Cross multiply
    103,493,213,998.70x = 155,239,820,998.05 × 85,826,839,700.30
  4. Step 4: Simplify right side
    103,493,213,998.70x = 13,323,743,231,902,901,862,400
  5. Step 5: Solve for x
    x = 13,323,743,231,902,901,862,400/103,493,213,998.70
  6. Step 6: Final answer
    x = 128,740,259,550.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.