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Finding the Fourth Proportional to 138,449.86, 207,674.79 and 43,689.63

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Solution

The fourth proportional to 138,449.86, 207,674.79 and 43,689.63 is: 65,534.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,449.86 : 207,674.79 = 43,689.63 : x
  2. Step 2: Convert to fraction form
    138,449.86/207,674.79 = 43,689.63/x
  3. Step 3: Cross multiply
    138,449.86x = 207,674.79 × 43,689.63
  4. Step 4: Simplify right side
    138,449.86x = 9,073,234,182.20
  5. Step 5: Solve for x
    x = 9,073,234,182.20/138,449.86
  6. Step 6: Final answer
    x = 65,534.44

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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.