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Finding the Fourth Proportional to 139,480.66, 209,205.87 and 82,560.34

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Solution

The fourth proportional to 139,480.66, 209,205.87 and 82,560.34 is: 123,831.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,480.66 : 209,205.87 = 82,560.34 : x
  2. Step 2: Convert to fraction form
    139,480.66/209,205.87 = 82,560.34/x
  3. Step 3: Cross multiply
    139,480.66x = 209,205.87 × 82,560.34
  4. Step 4: Simplify right side
    139,480.66x = 17,272,107,757.20
  5. Step 5: Solve for x
    x = 17,272,107,757.20/139,480.66
  6. Step 6: Final answer
    x = 123,831.56

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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.