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Finding the Fourth Proportional to 123,987.28, 171,103.44 and 67,398.52

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Solution

The fourth proportional to 123,987.28, 171,103.44 and 67,398.52 is: 93,010.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,987.28 : 171,103.44 = 67,398.52 : x
  2. Step 2: Convert to fraction form
    123,987.28/171,103.44 = 67,398.52/x
  3. Step 3: Cross multiply
    123,987.28x = 171,103.44 × 67,398.52
  4. Step 4: Simplify right side
    123,987.28x = 11,532,118,622.91
  5. Step 5: Solve for x
    x = 11,532,118,622.91/123,987.28
  6. Step 6: Final answer
    x = 93,010.50

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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.