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Finding the Fourth Proportional to 91,671.21, 137,546.03 and 38,375.64

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Solution

The fourth proportional to 91,671.21, 137,546.03 and 38,375.64 is: 57,579.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,671.21 : 137,546.03 = 38,375.64 : x
  2. Step 2: Convert to fraction form
    91,671.21/137,546.03 = 38,375.64/x
  3. Step 3: Cross multiply
    91,671.21x = 137,546.03 × 38,375.64
  4. Step 4: Simplify right side
    91,671.21x = 5,278,417,026.65
  5. Step 5: Solve for x
    x = 5,278,417,026.65/91,671.21
  6. Step 6: Final answer
    x = 57,579.88

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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.