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Finding the Fourth Proportional to 139,374.48, 192,338.84 and 75,713.52

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Solution

The fourth proportional to 139,374.48, 192,338.84 and 75,713.52 is: 104,485.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,374.48 : 192,338.84 = 75,713.52 : x
  2. Step 2: Convert to fraction form
    139,374.48/192,338.84 = 75,713.52/x
  3. Step 3: Cross multiply
    139,374.48x = 192,338.84 × 75,713.52
  4. Step 4: Simplify right side
    139,374.48x = 14,562,650,609.12
  5. Step 5: Solve for x
    x = 14,562,650,609.12/139,374.48
  6. Step 6: Final answer
    x = 104,485.78

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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.