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Finding the Fourth Proportional to 123,248.64, 170,084.10 and 72,262.71

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Solution

The fourth proportional to 123,248.64, 170,084.10 and 72,262.71 is: 99,723.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,248.64 : 170,084.10 = 72,262.71 : x
  2. Step 2: Convert to fraction form
    123,248.64/170,084.10 = 72,262.71/x
  3. Step 3: Cross multiply
    123,248.64x = 170,084.10 × 72,262.71
  4. Step 4: Simplify right side
    123,248.64x = 12,290,737,993.91
  5. Step 5: Solve for x
    x = 12,290,737,993.91/123,248.64
  6. Step 6: Final answer
    x = 99,723.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.