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Finding the Fourth Proportional to 168,143.56, 252,164.70 and 138,487.72

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Solution

The fourth proportional to 168,143.56, 252,164.70 and 138,487.72 is: 207,689.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,143.56 : 252,164.70 = 138,487.72 : x
  2. Step 2: Convert to fraction form
    168,143.56/252,164.70 = 138,487.72/x
  3. Step 3: Cross multiply
    168,143.56x = 252,164.70 × 138,487.72
  4. Step 4: Simplify right side
    168,143.56x = 34,921,714,367.48
  5. Step 5: Solve for x
    x = 34,921,714,367.48/168,143.56
  6. Step 6: Final answer
    x = 207,689.87

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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.