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Finding the Fourth Proportional to 88,475.80, 132,972.90 and 86,920.60

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Solution

The fourth proportional to 88,475.80, 132,972.90 and 86,920.60 is: 130,635.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,475.80 : 132,972.90 = 86,920.60 : x
  2. Step 2: Convert to fraction form
    88,475.80/132,972.90 = 86,920.60/x
  3. Step 3: Cross multiply
    88,475.80x = 132,972.90 × 86,920.60
  4. Step 4: Simplify right side
    88,475.80x = 11,558,084,251.74
  5. Step 5: Solve for x
    x = 11,558,084,251.74/88,475.80
  6. Step 6: Final answer
    x = 130,635.54

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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.