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Finding the Fourth Proportional to 84,634.68, 126,919.17 and 45,170.28

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Solution

The fourth proportional to 84,634.68, 126,919.17 and 45,170.28 is: 67,737.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,634.68 : 126,919.17 = 45,170.28 : x
  2. Step 2: Convert to fraction form
    84,634.68/126,919.17 = 45,170.28/x
  3. Step 3: Cross multiply
    84,634.68x = 126,919.17 × 45,170.28
  4. Step 4: Simplify right side
    84,634.68x = 5,732,974,446.27
  5. Step 5: Solve for x
    x = 5,732,974,446.27/84,634.68
  6. Step 6: Final answer
    x = 67,737.89

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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.