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Finding the Fourth Proportional to 81,166.20, 121,691.70 and 36,814.20

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Solution

The fourth proportional to 81,166.20, 121,691.70 and 36,814.20 is: 55,195.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,166.20 : 121,691.70 = 36,814.20 : x
  2. Step 2: Convert to fraction form
    81,166.20/121,691.70 = 36,814.20/x
  3. Step 3: Cross multiply
    81,166.20x = 121,691.70 × 36,814.20
  4. Step 4: Simplify right side
    81,166.20x = 4,479,982,582.14
  5. Step 5: Solve for x
    x = 4,479,982,582.14/81,166.20
  6. Step 6: Final answer
    x = 55,195.17

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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.