Home / 126,064.10-188,846.55-81,721.70

Finding the Fourth Proportional to 126,064.10, 188,846.55 and 81,721.70

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Solution

The fourth proportional to 126,064.10, 188,846.55 and 81,721.70 is: 122,420.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,064.10 : 188,846.55 = 81,721.70 : x
  2. Step 2: Convert to fraction form
    126,064.10/188,846.55 = 81,721.70/x
  3. Step 3: Cross multiply
    126,064.10x = 188,846.55 × 81,721.70
  4. Step 4: Simplify right side
    126,064.10x = 15,432,861,105.14
  5. Step 5: Solve for x
    x = 15,432,861,105.14/126,064.10
  6. Step 6: Final answer
    x = 122,420.75

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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.