Home / 121,610.40-182,479.68-86,299.76

Finding the Fourth Proportional to 121,610.40, 182,479.68 and 86,299.76

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Solution

The fourth proportional to 121,610.40, 182,479.68 and 86,299.76 is: 129,495.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,610.40 : 182,479.68 = 86,299.76 : x
  2. Step 2: Convert to fraction form
    121,610.40/182,479.68 = 86,299.76/x
  3. Step 3: Cross multiply
    121,610.40x = 182,479.68 × 86,299.76
  4. Step 4: Simplify right side
    121,610.40x = 15,747,952,588.88
  5. Step 5: Solve for x
    x = 15,747,952,588.88/121,610.40
  6. Step 6: Final answer
    x = 129,495.11

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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.