Home / 138,711.23-191,247.21-113,191.67

Finding the Fourth Proportional to 138,711.23, 191,247.21 and 113,191.67

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Solution

The fourth proportional to 138,711.23, 191,247.21 and 113,191.67 is: 156,062.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,711.23 : 191,247.21 = 113,191.67 : x
  2. Step 2: Convert to fraction form
    138,711.23/191,247.21 = 113,191.67/x
  3. Step 3: Cross multiply
    138,711.23x = 191,247.21 × 113,191.67
  4. Step 4: Simplify right side
    138,711.23x = 21,647,591,082.74
  5. Step 5: Solve for x
    x = 21,647,591,082.74/138,711.23
  6. Step 6: Final answer
    x = 156,062.28

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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.