Home / 71,939.92-99,276.68-40,109.20

Finding the Fourth Proportional to 71,939.92, 99,276.68 and 40,109.20

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Solution

The fourth proportional to 71,939.92, 99,276.68 and 40,109.20 is: 55,350.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,939.92 : 99,276.68 = 40,109.20 : x
  2. Step 2: Convert to fraction form
    71,939.92/99,276.68 = 40,109.20/x
  3. Step 3: Cross multiply
    71,939.92x = 99,276.68 × 40,109.20
  4. Step 4: Simplify right side
    71,939.92x = 3,981,908,213.46
  5. Step 5: Solve for x
    x = 3,981,908,213.46/71,939.92
  6. Step 6: Final answer
    x = 55,350.47

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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.