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Finding the Fourth Proportional to 85,381.19, 117,815.17 and 47,657.03

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Solution

The fourth proportional to 85,381.19, 117,815.17 and 47,657.03 is: 65,760.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,381.19 : 117,815.17 = 47,657.03 : x
  2. Step 2: Convert to fraction form
    85,381.19/117,815.17 = 47,657.03/x
  3. Step 3: Cross multiply
    85,381.19x = 117,815.17 × 47,657.03
  4. Step 4: Simplify right side
    85,381.19x = 5,614,721,091.15
  5. Step 5: Solve for x
    x = 5,614,721,091.15/85,381.19
  6. Step 6: Final answer
    x = 65,760.63

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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.