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Finding the Fourth Proportional to 139,248.12, 192,162.42 and 75,585.90

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Solution

The fourth proportional to 139,248.12, 192,162.42 and 75,585.90 is: 104,308.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,248.12 : 192,162.42 = 75,585.90 : x
  2. Step 2: Convert to fraction form
    139,248.12/192,162.42 = 75,585.90/x
  3. Step 3: Cross multiply
    139,248.12x = 192,162.42 × 75,585.90
  4. Step 4: Simplify right side
    139,248.12x = 14,524,769,461.88
  5. Step 5: Solve for x
    x = 14,524,769,461.88/139,248.12
  6. Step 6: Final answer
    x = 104,308.55

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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.