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Finding the Fourth Proportional to 71,998.86, 99,358.04 and 40,167.68

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Solution

The fourth proportional to 71,998.86, 99,358.04 and 40,167.68 is: 55,431.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,998.86 : 99,358.04 = 40,167.68 : x
  2. Step 2: Convert to fraction form
    71,998.86/99,358.04 = 40,167.68/x
  3. Step 3: Cross multiply
    71,998.86x = 99,358.04 × 40,167.68
  4. Step 4: Simplify right side
    71,998.86x = 3,990,981,956.15
  5. Step 5: Solve for x
    x = 3,990,981,956.15/71,998.86
  6. Step 6: Final answer
    x = 55,431.18

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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.