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Finding the Fourth Proportional to 131,660.71, 181,691.79 and 71,231.32

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Solution

The fourth proportional to 131,660.71, 181,691.79 and 71,231.32 is: 98,299.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,660.71 : 181,691.79 = 71,231.32 : x
  2. Step 2: Convert to fraction form
    131,660.71/181,691.79 = 71,231.32/x
  3. Step 3: Cross multiply
    131,660.71x = 181,691.79 × 71,231.32
  4. Step 4: Simplify right side
    131,660.71x = 12,942,144,972.84
  5. Step 5: Solve for x
    x = 12,942,144,972.84/131,660.71
  6. Step 6: Final answer
    x = 98,299.22

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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.