Home / 121,012.70-181,519.05-87,575.90

Finding the Fourth Proportional to 121,012.70, 181,519.05 and 87,575.90

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Solution

The fourth proportional to 121,012.70, 181,519.05 and 87,575.90 is: 131,363.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,012.70 : 181,519.05 = 87,575.90 : x
  2. Step 2: Convert to fraction form
    121,012.70/181,519.05 = 87,575.90/x
  3. Step 3: Cross multiply
    121,012.70x = 181,519.05 × 87,575.90
  4. Step 4: Simplify right side
    121,012.70x = 15,896,694,170.90
  5. Step 5: Solve for x
    x = 15,896,694,170.90/121,012.70
  6. Step 6: Final answer
    x = 131,363.85

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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.