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Finding the Fourth Proportional to 79,487,999.70, 119,231,999.55 and 78,984,114.90

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Solution

The fourth proportional to 79,487,999.70, 119,231,999.55 and 78,984,114.90 is: 118,476,172.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,487,999.70 : 119,231,999.55 = 78,984,114.90 : x
  2. Step 2: Convert to fraction form
    79,487,999.70/119,231,999.55 = 78,984,114.90/x
  3. Step 3: Cross multiply
    79,487,999.70x = 119,231,999.55 × 78,984,114.90
  4. Step 4: Simplify right side
    79,487,999.70x = 9,417,433,952,213,948
  5. Step 5: Solve for x
    x = 9,417,433,952,213,948/79,487,999.70
  6. Step 6: Final answer
    x = 118,476,172.35

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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.