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Finding the Fourth Proportional to 88,877.20, 133,388.70 and 85,961.20

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Solution

The fourth proportional to 88,877.20, 133,388.70 and 85,961.20 is: 129,012.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,877.20 : 133,388.70 = 85,961.20 : x
  2. Step 2: Convert to fraction form
    88,877.20/133,388.70 = 85,961.20/x
  3. Step 3: Cross multiply
    88,877.20x = 133,388.70 × 85,961.20
  4. Step 4: Simplify right side
    88,877.20x = 11,466,252,718.44
  5. Step 5: Solve for x
    x = 11,466,252,718.44/88,877.20
  6. Step 6: Final answer
    x = 129,012.31

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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.