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Finding the Fourth Proportional to 139,400.66, 192,372.87 and 75,738.71

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Solution

The fourth proportional to 139,400.66, 192,372.87 and 75,738.71 is: 104,519.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,400.66 : 192,372.87 = 75,738.71 : x
  2. Step 2: Convert to fraction form
    139,400.66/192,372.87 = 75,738.71/x
  3. Step 3: Cross multiply
    139,400.66x = 192,372.87 × 75,738.71
  4. Step 4: Simplify right side
    139,400.66x = 14,570,073,777.75
  5. Step 5: Solve for x
    x = 14,570,073,777.75/139,400.66
  6. Step 6: Final answer
    x = 104,519.40

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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.