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Finding the Fourth Proportional to 88,915.90, 133,049.85 and 65,587.90

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Solution

The fourth proportional to 88,915.90, 133,049.85 and 65,587.90 is: 98,142.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,915.90 : 133,049.85 = 65,587.90 : x
  2. Step 2: Convert to fraction form
    88,915.90/133,049.85 = 65,587.90/x
  3. Step 3: Cross multiply
    88,915.90x = 133,049.85 × 65,587.90
  4. Step 4: Simplify right side
    88,915.90x = 8,726,460,256.82
  5. Step 5: Solve for x
    x = 8,726,460,256.82/88,915.90
  6. Step 6: Final answer
    x = 98,142.85

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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.