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Finding the Fourth Proportional to 72,407,638.80, 108,737,429.40 and 38,395,414.80

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Solution

The fourth proportional to 72,407,638.80, 108,737,429.40 and 38,395,414.80 is: 57,659,920.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,407,638.80 : 108,737,429.40 = 38,395,414.80 : x
  2. Step 2: Convert to fraction form
    72,407,638.80/108,737,429.40 = 38,395,414.80/x
  3. Step 3: Cross multiply
    72,407,638.80x = 108,737,429.40 × 38,395,414.80
  4. Step 4: Simplify right side
    72,407,638.80x = 4,175,018,706,098,715
  5. Step 5: Solve for x
    x = 4,175,018,706,098,715/72,407,638.80
  6. Step 6: Final answer
    x = 57,659,920.63

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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.