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Finding the Fourth Proportional to 123,229.86, 170,056.87 and 66,641.23

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Solution

The fourth proportional to 123,229.86, 170,056.87 and 66,641.23 is: 91,964.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,229.86 : 170,056.87 = 66,641.23 : x
  2. Step 2: Convert to fraction form
    123,229.86/170,056.87 = 66,641.23/x
  3. Step 3: Cross multiply
    123,229.86x = 170,056.87 × 66,641.23
  4. Step 4: Simplify right side
    123,229.86x = 11,332,799,032.72
  5. Step 5: Solve for x
    x = 11,332,799,032.72/123,229.86
  6. Step 6: Final answer
    x = 91,964.72

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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.