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Finding the Fourth Proportional to 139,223.70, 192,129.39 and 75,561.57

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Solution

The fourth proportional to 139,223.70, 192,129.39 and 75,561.57 is: 104,275.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,223.70 : 192,129.39 = 75,561.57 : x
  2. Step 2: Convert to fraction form
    139,223.70/192,129.39 = 75,561.57/x
  3. Step 3: Cross multiply
    139,223.70x = 192,129.39 × 75,561.57
  4. Step 4: Simplify right side
    139,223.70x = 14,517,598,351.54
  5. Step 5: Solve for x
    x = 14,517,598,351.54/139,223.70
  6. Step 6: Final answer
    x = 104,275.34

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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.