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Finding the Fourth Proportional to 139,805.04, 209,691.86 and 38,617.48

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Solution

The fourth proportional to 139,805.04, 209,691.86 and 38,617.48 is: 57,921.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,805.04 : 209,691.86 = 38,617.48 : x
  2. Step 2: Convert to fraction form
    139,805.04/209,691.86 = 38,617.48/x
  3. Step 3: Cross multiply
    139,805.04x = 209,691.86 × 38,617.48
  4. Step 4: Simplify right side
    139,805.04x = 8,097,770,161.25
  5. Step 5: Solve for x
    x = 8,097,770,161.25/139,805.04
  6. Step 6: Final answer
    x = 57,921.88

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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.