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Finding the Fourth Proportional to 65,375.01, 90,115.16 and 42,702.66

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Solution

The fourth proportional to 65,375.01, 90,115.16 and 42,702.66 is: 58,862.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,375.01 : 90,115.16 = 42,702.66 : x
  2. Step 2: Convert to fraction form
    65,375.01/90,115.16 = 42,702.66/x
  3. Step 3: Cross multiply
    65,375.01x = 90,115.16 × 42,702.66
  4. Step 4: Simplify right side
    65,375.01x = 3,848,156,834.97
  5. Step 5: Solve for x
    x = 3,848,156,834.97/65,375.01
  6. Step 6: Final answer
    x = 58,862.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.