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Finding the Fourth Proportional to 71,395.92, 107,062.80 and 38,108.56

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Solution

The fourth proportional to 71,395.92, 107,062.80 and 38,108.56 is: 57,146.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,395.92 : 107,062.80 = 38,108.56 : x
  2. Step 2: Convert to fraction form
    71,395.92/107,062.80 = 38,108.56/x
  3. Step 3: Cross multiply
    71,395.92x = 107,062.80 × 38,108.56
  4. Step 4: Simplify right side
    71,395.92x = 4,080,009,137.57
  5. Step 5: Solve for x
    x = 4,080,009,137.57/71,395.92
  6. Step 6: Final answer
    x = 57,146.25

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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.