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Finding the Fourth Proportional to 124,481.80, 186,721.20 and 87,815.80

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Solution

The fourth proportional to 124,481.80, 186,721.20 and 87,815.80 is: 131,722.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,481.80 : 186,721.20 = 87,815.80 : x
  2. Step 2: Convert to fraction form
    124,481.80/186,721.20 = 87,815.80/x
  3. Step 3: Cross multiply
    124,481.80x = 186,721.20 × 87,815.80
  4. Step 4: Simplify right side
    124,481.80x = 16,397,071,554.96
  5. Step 5: Solve for x
    x = 16,397,071,554.96/124,481.80
  6. Step 6: Final answer
    x = 131,722.64

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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.