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Finding the Fourth Proportional to 123,963.60, 185,815.80 and 67,717.20

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Solution

The fourth proportional to 123,963.60, 185,815.80 and 67,717.20 is: 101,505.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,963.60 : 185,815.80 = 67,717.20 : x
  2. Step 2: Convert to fraction form
    123,963.60/185,815.80 = 67,717.20/x
  3. Step 3: Cross multiply
    123,963.60x = 185,815.80 × 67,717.20
  4. Step 4: Simplify right side
    123,963.60x = 12,582,925,691.76
  5. Step 5: Solve for x
    x = 12,582,925,691.76/123,963.60
  6. Step 6: Final answer
    x = 101,505.00

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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.