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Finding the Fourth Proportional to 123,902.78, 170,987.92 and 67,314.20

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Solution

The fourth proportional to 123,902.78, 170,987.92 and 67,314.20 is: 92,894.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,902.78 : 170,987.92 = 67,314.20 : x
  2. Step 2: Convert to fraction form
    123,902.78/170,987.92 = 67,314.20/x
  3. Step 3: Cross multiply
    123,902.78x = 170,987.92 × 67,314.20
  4. Step 4: Simplify right side
    123,902.78x = 11,509,915,044.46
  5. Step 5: Solve for x
    x = 11,509,915,044.46/123,902.78
  6. Step 6: Final answer
    x = 92,894.73

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1.5x scale

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.