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Finding the Fourth Proportional to 72,082.26, 99,473.12 and 39,819.10

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Solution

The fourth proportional to 72,082.26, 99,473.12 and 39,819.10 is: 54,950.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,082.26 : 99,473.12 = 39,819.10 : x
  2. Step 2: Convert to fraction form
    72,082.26/99,473.12 = 39,819.10/x
  3. Step 3: Cross multiply
    72,082.26x = 99,473.12 × 39,819.10
  4. Step 4: Simplify right side
    72,082.26x = 3,960,930,112.59
  5. Step 5: Solve for x
    x = 3,960,930,112.59/72,082.26
  6. Step 6: Final answer
    x = 54,950.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.