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Finding the Fourth Proportional to 82,453.30, 123,679.95 and 20,123.80

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Solution

The fourth proportional to 82,453.30, 123,679.95 and 20,123.80 is: 30,185.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,453.30 : 123,679.95 = 20,123.80 : x
  2. Step 2: Convert to fraction form
    82,453.30/123,679.95 = 20,123.80/x
  3. Step 3: Cross multiply
    82,453.30x = 123,679.95 × 20,123.80
  4. Step 4: Simplify right side
    82,453.30x = 2,488,910,577.81
  5. Step 5: Solve for x
    x = 2,488,910,577.81/82,453.30
  6. Step 6: Final answer
    x = 30,185.70

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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.