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Finding the Fourth Proportional to 231,708.66, 319,683.60 and 129,719.10

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Solution

The fourth proportional to 231,708.66, 319,683.60 and 129,719.10 is: 178,970.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,708.66 : 319,683.60 = 129,719.10 : x
  2. Step 2: Convert to fraction form
    231,708.66/319,683.60 = 129,719.10/x
  3. Step 3: Cross multiply
    231,708.66x = 319,683.60 × 129,719.10
  4. Step 4: Simplify right side
    231,708.66x = 41,469,068,876.76
  5. Step 5: Solve for x
    x = 41,469,068,876.76/231,708.66
  6. Step 6: Final answer
    x = 178,970.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.