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Finding the Fourth Proportional to 91,785.87, 137,621.43 and 38,463.44

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Solution

The fourth proportional to 91,785.87, 137,621.43 and 38,463.44 is: 57,671.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,785.87 : 137,621.43 = 38,463.44 : x
  2. Step 2: Convert to fraction form
    91,785.87/137,621.43 = 38,463.44/x
  3. Step 3: Cross multiply
    91,785.87x = 137,621.43 × 38,463.44
  4. Step 4: Simplify right side
    91,785.87x = 5,293,393,615.52
  5. Step 5: Solve for x
    x = 5,293,393,615.52/91,785.87
  6. Step 6: Final answer
    x = 57,671.12

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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.