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Finding the Fourth Proportional to 61,139.92, 91,710 and 16,767.28

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Solution

The fourth proportional to 61,139.92, 91,710 and 16,767.28 is: 25,150.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,139.92 : 91,710 = 16,767.28 : x
  2. Step 2: Convert to fraction form
    61,139.92/91,710 = 16,767.28/x
  3. Step 3: Cross multiply
    61,139.92x = 91,710 × 16,767.28
  4. Step 4: Simplify right side
    61,139.92x = 1,537,727,248.80
  5. Step 5: Solve for x
    x = 1,537,727,248.80/61,139.92
  6. Step 6: Final answer
    x = 25,150.95

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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.