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Finding the Fourth Proportional to 139,229.32, 208,867.80 and 54,945.52

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Solution

The fourth proportional to 139,229.32, 208,867.80 and 54,945.52 is: 82,427.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,229.32 : 208,867.80 = 54,945.52 : x
  2. Step 2: Convert to fraction form
    139,229.32/208,867.80 = 54,945.52/x
  3. Step 3: Cross multiply
    139,229.32x = 208,867.80 × 54,945.52
  4. Step 4: Simplify right side
    139,229.32x = 11,476,349,882.26
  5. Step 5: Solve for x
    x = 11,476,349,882.26/139,229.32
  6. Step 6: Final answer
    x = 82,427.68

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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.