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Finding the Fourth Proportional to 82,618.92, 123,928.38 and 20,289.42

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Solution

The fourth proportional to 82,618.92, 123,928.38 and 20,289.42 is: 30,434.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,618.92 : 123,928.38 = 20,289.42 : x
  2. Step 2: Convert to fraction form
    82,618.92/123,928.38 = 20,289.42/x
  3. Step 3: Cross multiply
    82,618.92x = 123,928.38 × 20,289.42
  4. Step 4: Simplify right side
    82,618.92x = 2,514,434,951.74
  5. Step 5: Solve for x
    x = 2,514,434,951.74/82,618.92
  6. Step 6: Final answer
    x = 30,434.13

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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.