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Finding the Fourth Proportional to 238,963.68, 358,453.92 and 81,171.60

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Solution

The fourth proportional to 238,963.68, 358,453.92 and 81,171.60 is: 121,760.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,963.68 : 358,453.92 = 81,171.60 : x
  2. Step 2: Convert to fraction form
    238,963.68/358,453.92 = 81,171.60/x
  3. Step 3: Cross multiply
    238,963.68x = 358,453.92 × 81,171.60
  4. Step 4: Simplify right side
    238,963.68x = 29,096,278,212.67
  5. Step 5: Solve for x
    x = 29,096,278,212.67/238,963.68
  6. Step 6: Final answer
    x = 121,760.25

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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.