Home / 261,305,999.20-391,958,998.80-79,529,557.60

Finding the Fourth Proportional to 261,305,999.20, 391,958,998.80 and 79,529,557.60

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Solution

The fourth proportional to 261,305,999.20, 391,958,998.80 and 79,529,557.60 is: 119,294,336.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,305,999.20 : 391,958,998.80 = 79,529,557.60 : x
  2. Step 2: Convert to fraction form
    261,305,999.20/391,958,998.80 = 79,529,557.60/x
  3. Step 3: Cross multiply
    261,305,999.20x = 391,958,998.80 × 79,529,557.60
  4. Step 4: Simplify right side
    261,305,999.20x = 31,172,325,771,902,928
  5. Step 5: Solve for x
    x = 31,172,325,771,902,928/261,305,999.20
  6. Step 6: Final answer
    x = 119,294,336.40

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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.