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Finding the Fourth Proportional to 169,719.60, 254,233.80 and 86,660.40

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Solution

The fourth proportional to 169,719.60, 254,233.80 and 86,660.40 is: 129,814.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,719.60 : 254,233.80 = 86,660.40 : x
  2. Step 2: Convert to fraction form
    169,719.60/254,233.80 = 86,660.40/x
  3. Step 3: Cross multiply
    169,719.60x = 254,233.80 × 86,660.40
  4. Step 4: Simplify right side
    169,719.60x = 22,032,002,801.52
  5. Step 5: Solve for x
    x = 22,032,002,801.52/169,719.60
  6. Step 6: Final answer
    x = 129,814.13

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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.