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Finding the Fourth Proportional to 124,479, 171,781.02 and 67,890.78

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Solution

The fourth proportional to 124,479, 171,781.02 and 67,890.78 is: 93,689.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,479 : 171,781.02 = 67,890.78 : x
  2. Step 2: Convert to fraction form
    124,479/171,781.02 = 67,890.78/x
  3. Step 3: Cross multiply
    124,479x = 171,781.02 × 67,890.78
  4. Step 4: Simplify right side
    124,479x = 11,662,347,437.00
  5. Step 5: Solve for x
    x = 11,662,347,437.00/124,479
  6. Step 6: Final answer
    x = 93,689.28

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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.