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Finding the Fourth Proportional to 85,311.62, 117,729.68 and 47,073.54

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Solution

The fourth proportional to 85,311.62, 117,729.68 and 47,073.54 is: 64,961.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,311.62 : 117,729.68 = 47,073.54 : x
  2. Step 2: Convert to fraction form
    85,311.62/117,729.68 = 47,073.54/x
  3. Step 3: Cross multiply
    85,311.62x = 117,729.68 × 47,073.54
  4. Step 4: Simplify right side
    85,311.62x = 5,541,952,800.67
  5. Step 5: Solve for x
    x = 5,541,952,800.67/85,311.62
  6. Step 6: Final answer
    x = 64,961.29

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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.