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Finding the Fourth Proportional to 139,632.38, 192,697.49 and 75,972.59

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Solution

The fourth proportional to 139,632.38, 192,697.49 and 75,972.59 is: 104,844.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,632.38 : 192,697.49 = 75,972.59 : x
  2. Step 2: Convert to fraction form
    139,632.38/192,697.49 = 75,972.59/x
  3. Step 3: Cross multiply
    139,632.38x = 192,697.49 × 75,972.59
  4. Step 4: Simplify right side
    139,632.38x = 14,639,727,021.94
  5. Step 5: Solve for x
    x = 14,639,727,021.94/139,632.38
  6. Step 6: Final answer
    x = 104,844.79

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1.5x scale

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.