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Finding the Fourth Proportional to 91,340.30, 137,029.62 and 38,748.62

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Solution

The fourth proportional to 91,340.30, 137,029.62 and 38,748.62 is: 58,131.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,340.30 : 137,029.62 = 38,748.62 : x
  2. Step 2: Convert to fraction form
    91,340.30/137,029.62 = 38,748.62/x
  3. Step 3: Cross multiply
    91,340.30x = 137,029.62 × 38,748.62
  4. Step 4: Simplify right side
    91,340.30x = 5,309,708,674.12
  5. Step 5: Solve for x
    x = 5,309,708,674.12/91,340.30
  6. Step 6: Final answer
    x = 58,131.06

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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.