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Finding the Fourth Proportional to 139,446.63, 192,439.19 and 75,788.53

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Solution

The fourth proportional to 139,446.63, 192,439.19 and 75,788.53 is: 104,589.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,446.63 : 192,439.19 = 75,788.53 : x
  2. Step 2: Convert to fraction form
    139,446.63/192,439.19 = 75,788.53/x
  3. Step 3: Cross multiply
    139,446.63x = 192,439.19 × 75,788.53
  4. Step 4: Simplify right side
    139,446.63x = 14,584,683,032.86
  5. Step 5: Solve for x
    x = 14,584,683,032.86/139,446.63
  6. Step 6: Final answer
    x = 104,589.71

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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.