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Finding the Fourth Proportional to 139,400.70, 192,365.70 and 75,738.42

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Solution

The fourth proportional to 139,400.70, 192,365.70 and 75,738.42 is: 104,515.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,400.70 : 192,365.70 = 75,738.42 : x
  2. Step 2: Convert to fraction form
    139,400.70/192,365.70 = 75,738.42/x
  3. Step 3: Cross multiply
    139,400.70x = 192,365.70 × 75,738.42
  4. Step 4: Simplify right side
    139,400.70x = 14,569,474,180.19
  5. Step 5: Solve for x
    x = 14,569,474,180.19/139,400.70
  6. Step 6: Final answer
    x = 104,515.07

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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.