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Finding the Fourth Proportional to 82,959.92, 124,439.88 and 20,630.42

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Solution

The fourth proportional to 82,959.92, 124,439.88 and 20,630.42 is: 30,945.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,959.92 : 124,439.88 = 20,630.42 : x
  2. Step 2: Convert to fraction form
    82,959.92/124,439.88 = 20,630.42/x
  3. Step 3: Cross multiply
    82,959.92x = 124,439.88 × 20,630.42
  4. Step 4: Simplify right side
    82,959.92x = 2,567,246,989.15
  5. Step 5: Solve for x
    x = 2,567,246,989.15/82,959.92
  6. Step 6: Final answer
    x = 30,945.63

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Similar ratio
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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.