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Finding the Fourth Proportional to 139,350.05, 192,304.08 and 75,687.86

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Solution

The fourth proportional to 139,350.05, 192,304.08 and 75,687.86 is: 104,449.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,350.05 : 192,304.08 = 75,687.86 : x
  2. Step 2: Convert to fraction form
    139,350.05/192,304.08 = 75,687.86/x
  3. Step 3: Cross multiply
    139,350.05x = 192,304.08 × 75,687.86
  4. Step 4: Simplify right side
    139,350.05x = 14,555,084,284.47
  5. Step 5: Solve for x
    x = 14,555,084,284.47/139,350.05
  6. Step 6: Final answer
    x = 104,449.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.