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Finding the Fourth Proportional to 124,481.80, 186,285.30 and 85,115.80

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Solution

The fourth proportional to 124,481.80, 186,285.30 and 85,115.80 is: 127,374.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,481.80 : 186,285.30 = 85,115.80 : x
  2. Step 2: Convert to fraction form
    124,481.80/186,285.30 = 85,115.80/x
  3. Step 3: Cross multiply
    124,481.80x = 186,285.30 × 85,115.80
  4. Step 4: Simplify right side
    124,481.80x = 15,855,822,337.74
  5. Step 5: Solve for x
    x = 15,855,822,337.74/124,481.80
  6. Step 6: Final answer
    x = 127,374.62

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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.