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Finding the Fourth Proportional to 82,624.88, 123,899.04 and 66,791

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Solution

The fourth proportional to 82,624.88, 123,899.04 and 66,791 is: 100,155.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,624.88 : 123,899.04 = 66,791 : x
  2. Step 2: Convert to fraction form
    82,624.88/123,899.04 = 66,791/x
  3. Step 3: Cross multiply
    82,624.88x = 123,899.04 × 66,791
  4. Step 4: Simplify right side
    82,624.88x = 8,275,340,780.64
  5. Step 5: Solve for x
    x = 8,275,340,780.64/82,624.88
  6. Step 6: Final answer
    x = 100,155.56

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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.