Home / 103,703,688.40-155,455,999.80-80,661,845.20

Finding the Fourth Proportional to 103,703,688.40, 155,455,999.80 and 80,661,845.20

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Solution

The fourth proportional to 103,703,688.40, 155,455,999.80 and 80,661,845.20 is: 120,915,350.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,703,688.40 : 155,455,999.80 = 80,661,845.20 : x
  2. Step 2: Convert to fraction form
    103,703,688.40/155,455,999.80 = 80,661,845.20/x
  3. Step 3: Cross multiply
    103,703,688.40x = 155,455,999.80 × 80,661,845.20
  4. Step 4: Simplify right side
    103,703,688.40x = 12,539,367,791,278,832
  5. Step 5: Solve for x
    x = 12,539,367,791,278,832/103,703,688.40
  6. Step 6: Final answer
    x = 120,915,350.12

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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.