Home / 139,313.43-192,253.28-78,895.85

Finding the Fourth Proportional to 139,313.43, 192,253.28 and 78,895.85

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Solution

The fourth proportional to 139,313.43, 192,253.28 and 78,895.85 is: 108,876.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,313.43 : 192,253.28 = 78,895.85 : x
  2. Step 2: Convert to fraction form
    139,313.43/192,253.28 = 78,895.85/x
  3. Step 3: Cross multiply
    139,313.43x = 192,253.28 × 78,895.85
  4. Step 4: Simplify right side
    139,313.43x = 15,167,984,585.14
  5. Step 5: Solve for x
    x = 15,167,984,585.14/139,313.43
  6. Step 6: Final answer
    x = 108,876.69

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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.