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Finding the Fourth Proportional to 79,149,761.80, 118,724,642.70 and 65,712,833.80

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Solution

The fourth proportional to 79,149,761.80, 118,724,642.70 and 65,712,833.80 is: 98,569,250.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,149,761.80 : 118,724,642.70 = 65,712,833.80 : x
  2. Step 2: Convert to fraction form
    79,149,761.80/118,724,642.70 = 65,712,833.80/x
  3. Step 3: Cross multiply
    79,149,761.80x = 118,724,642.70 × 65,712,833.80
  4. Step 4: Simplify right side
    79,149,761.80x = 7,801,732,713,709,483
  5. Step 5: Solve for x
    x = 7,801,732,713,709,483/79,149,761.80
  6. Step 6: Final answer
    x = 98,569,250.70

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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.