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Finding the Fourth Proportional to 72,800.97, 109,136.46 and 28,417.38

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Solution

The fourth proportional to 72,800.97, 109,136.46 and 28,417.38 is: 42,600.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,800.97 : 109,136.46 = 28,417.38 : x
  2. Step 2: Convert to fraction form
    72,800.97/109,136.46 = 28,417.38/x
  3. Step 3: Cross multiply
    72,800.97x = 109,136.46 × 28,417.38
  4. Step 4: Simplify right side
    72,800.97x = 3,101,372,255.67
  5. Step 5: Solve for x
    x = 3,101,372,255.67/72,800.97
  6. Step 6: Final answer
    x = 42,600.70

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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.