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Finding the Fourth Proportional to 81,951.28, 122,717.72 and 65,335.54

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Solution

The fourth proportional to 81,951.28, 122,717.72 and 65,335.54 is: 97,836.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,951.28 : 122,717.72 = 65,335.54 : x
  2. Step 2: Convert to fraction form
    81,951.28/122,717.72 = 65,335.54/x
  3. Step 3: Cross multiply
    81,951.28x = 122,717.72 × 65,335.54
  4. Step 4: Simplify right side
    81,951.28x = 8,017,828,177.09
  5. Step 5: Solve for x
    x = 8,017,828,177.09/81,951.28
  6. Step 6: Final answer
    x = 97,836.53

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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.