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Finding the Fourth Proportional to 139,386.62, 192,353.94 and 75,724.27

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Solution

The fourth proportional to 139,386.62, 192,353.94 and 75,724.27 is: 104,499.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,386.62 : 192,353.94 = 75,724.27 : x
  2. Step 2: Convert to fraction form
    139,386.62/192,353.94 = 75,724.27/x
  3. Step 3: Cross multiply
    139,386.62x = 192,353.94 × 75,724.27
  4. Step 4: Simplify right side
    139,386.62x = 14,565,861,207.24
  5. Step 5: Solve for x
    x = 14,565,861,207.24/139,386.62
  6. Step 6: Final answer
    x = 104,499.71

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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.