Home / 82,530.40-123,781.20-29,912.80

Finding the Fourth Proportional to 82,530.40, 123,781.20 and 29,912.80

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Solution

The fourth proportional to 82,530.40, 123,781.20 and 29,912.80 is: 44,863.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,530.40 : 123,781.20 = 29,912.80 : x
  2. Step 2: Convert to fraction form
    82,530.40/123,781.20 = 29,912.80/x
  3. Step 3: Cross multiply
    82,530.40x = 123,781.20 × 29,912.80
  4. Step 4: Simplify right side
    82,530.40x = 3,702,642,279.36
  5. Step 5: Solve for x
    x = 3,702,642,279.36/82,530.40
  6. Step 6: Final answer
    x = 44,863.98

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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.