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Finding the Fourth Proportional to 123,948.32, 171,000.39 and 91,759.99

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Solution

The fourth proportional to 123,948.32, 171,000.39 and 91,759.99 is: 126,593.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,948.32 : 171,000.39 = 91,759.99 : x
  2. Step 2: Convert to fraction form
    123,948.32/171,000.39 = 91,759.99/x
  3. Step 3: Cross multiply
    123,948.32x = 171,000.39 × 91,759.99
  4. Step 4: Simplify right side
    123,948.32x = 15,690,994,076.40
  5. Step 5: Solve for x
    x = 15,690,994,076.40/123,948.32
  6. Step 6: Final answer
    x = 126,593.04

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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.