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Finding the Fourth Proportional to 139,385.22, 192,350.54 and 75,723.48

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Solution

The fourth proportional to 139,385.22, 192,350.54 and 75,723.48 is: 104,497.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,385.22 : 192,350.54 = 75,723.48 : x
  2. Step 2: Convert to fraction form
    139,385.22/192,350.54 = 75,723.48/x
  3. Step 3: Cross multiply
    139,385.22x = 192,350.54 × 75,723.48
  4. Step 4: Simplify right side
    139,385.22x = 14,565,452,268.68
  5. Step 5: Solve for x
    x = 14,565,452,268.68/139,385.22
  6. Step 6: Final answer
    x = 104,497.82

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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.