Home / 82,545.20-123,817.80-20,215.70

Finding the Fourth Proportional to 82,545.20, 123,817.80 and 20,215.70

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Solution

The fourth proportional to 82,545.20, 123,817.80 and 20,215.70 is: 30,323.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,545.20 : 123,817.80 = 20,215.70 : x
  2. Step 2: Convert to fraction form
    82,545.20/123,817.80 = 20,215.70/x
  3. Step 3: Cross multiply
    82,545.20x = 123,817.80 × 20,215.70
  4. Step 4: Simplify right side
    82,545.20x = 2,503,063,499.46
  5. Step 5: Solve for x
    x = 2,503,063,499.46/82,545.20
  6. Step 6: Final answer
    x = 30,323.55

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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.