Home / 139,378.08-192,421.44-91,769.76

Finding the Fourth Proportional to 139,378.08, 192,421.44 and 91,769.76

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Solution

The fourth proportional to 139,378.08, 192,421.44 and 91,769.76 is: 126,694.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,378.08 : 192,421.44 = 91,769.76 : x
  2. Step 2: Convert to fraction form
    139,378.08/192,421.44 = 91,769.76/x
  3. Step 3: Cross multiply
    139,378.08x = 192,421.44 × 91,769.76
  4. Step 4: Simplify right side
    139,378.08x = 17,658,469,367.65
  5. Step 5: Solve for x
    x = 17,658,469,367.65/139,378.08
  6. Step 6: Final answer
    x = 126,694.74

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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.