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Finding the Fourth Proportional to 123,540.20, 185,310.30 and 81,476.90

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Solution

The fourth proportional to 123,540.20, 185,310.30 and 81,476.90 is: 122,215.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,540.20 : 185,310.30 = 81,476.90 : x
  2. Step 2: Convert to fraction form
    123,540.20/185,310.30 = 81,476.90/x
  3. Step 3: Cross multiply
    123,540.20x = 185,310.30 × 81,476.90
  4. Step 4: Simplify right side
    123,540.20x = 15,098,508,782.07
  5. Step 5: Solve for x
    x = 15,098,508,782.07/123,540.20
  6. Step 6: Final answer
    x = 122,215.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.