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Finding the Fourth Proportional to 123,447.72, 170,358.09 and 66,859.11

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Solution

The fourth proportional to 123,447.72, 170,358.09 and 66,859.11 is: 92,265.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,447.72 : 170,358.09 = 66,859.11 : x
  2. Step 2: Convert to fraction form
    123,447.72/170,358.09 = 66,859.11/x
  3. Step 3: Cross multiply
    123,447.72x = 170,358.09 × 66,859.11
  4. Step 4: Simplify right side
    123,447.72x = 11,389,990,278.70
  5. Step 5: Solve for x
    x = 11,389,990,278.70/123,447.72
  6. Step 6: Final answer
    x = 92,265.70

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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.