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Finding the Fourth Proportional to 139,232.54, 208,375.68 and 85,958.48

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Solution

The fourth proportional to 139,232.54, 208,375.68 and 85,958.48 is: 128,645.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,232.54 : 208,375.68 = 85,958.48 : x
  2. Step 2: Convert to fraction form
    139,232.54/208,375.68 = 85,958.48/x
  3. Step 3: Cross multiply
    139,232.54x = 208,375.68 × 85,958.48
  4. Step 4: Simplify right side
    139,232.54x = 17,911,656,721.77
  5. Step 5: Solve for x
    x = 17,911,656,721.77/139,232.54
  6. Step 6: Final answer
    x = 128,645.62

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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.