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Finding the Fourth Proportional to 88,915.80, 133,045.65 and 81,042.60

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Solution

The fourth proportional to 88,915.80, 133,045.65 and 81,042.60 is: 121,264.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,915.80 : 133,045.65 = 81,042.60 : x
  2. Step 2: Convert to fraction form
    88,915.80/133,045.65 = 81,042.60/x
  3. Step 3: Cross multiply
    88,915.80x = 133,045.65 × 81,042.60
  4. Step 4: Simplify right side
    88,915.80x = 10,782,365,394.69
  5. Step 5: Solve for x
    x = 10,782,365,394.69/88,915.80
  6. Step 6: Final answer
    x = 121,264.90

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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.