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Finding the Fourth Proportional to 88,640.68, 132,648.90 and 55,376.41

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Solution

The fourth proportional to 88,640.68, 132,648.90 and 55,376.41 is: 82,869.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,640.68 : 132,648.90 = 55,376.41 : x
  2. Step 2: Convert to fraction form
    88,640.68/132,648.90 = 55,376.41/x
  3. Step 3: Cross multiply
    88,640.68x = 132,648.90 × 55,376.41
  4. Step 4: Simplify right side
    88,640.68x = 7,345,619,872.45
  5. Step 5: Solve for x
    x = 7,345,619,872.45/88,640.68
  6. Step 6: Final answer
    x = 82,869.62

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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.