Home / 121,318.36-182,013.68-87,660.43

Finding the Fourth Proportional to 121,318.36, 182,013.68 and 87,660.43

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Solution

The fourth proportional to 121,318.36, 182,013.68 and 87,660.43 is: 131,516.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,318.36 : 182,013.68 = 87,660.43 : x
  2. Step 2: Convert to fraction form
    121,318.36/182,013.68 = 87,660.43/x
  3. Step 3: Cross multiply
    121,318.36x = 182,013.68 × 87,660.43
  4. Step 4: Simplify right side
    121,318.36x = 15,955,397,218.80
  5. Step 5: Solve for x
    x = 15,955,397,218.80/121,318.36
  6. Step 6: Final answer
    x = 131,516.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.