Home / 138,711.16-191,247.13-113,191.61

Finding the Fourth Proportional to 138,711.16, 191,247.13 and 113,191.61

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Solution

The fourth proportional to 138,711.16, 191,247.13 and 113,191.61 is: 156,062.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,711.16 : 191,247.13 = 113,191.61 : x
  2. Step 2: Convert to fraction form
    138,711.16/191,247.13 = 113,191.61/x
  3. Step 3: Cross multiply
    138,711.16x = 191,247.13 × 113,191.61
  4. Step 4: Simplify right side
    138,711.16x = 21,647,569,030.39
  5. Step 5: Solve for x
    x = 21,647,569,030.39/138,711.16
  6. Step 6: Final answer
    x = 156,062.20

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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.