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Finding the Fourth Proportional to 123,861.20, 185,791.80 and 115,566.80

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Solution

The fourth proportional to 123,861.20, 185,791.80 and 115,566.80 is: 173,350.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,861.20 : 185,791.80 = 115,566.80 : x
  2. Step 2: Convert to fraction form
    123,861.20/185,791.80 = 115,566.80/x
  3. Step 3: Cross multiply
    123,861.20x = 185,791.80 × 115,566.80
  4. Step 4: Simplify right side
    123,861.20x = 21,471,363,792.24
  5. Step 5: Solve for x
    x = 21,471,363,792.24/123,861.20
  6. Step 6: Final answer
    x = 173,350.20

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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.