Home / 207,920.70-311,881.05-123,721.20

Finding the Fourth Proportional to 207,920.70, 311,881.05 and 123,721.20

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Solution

The fourth proportional to 207,920.70, 311,881.05 and 123,721.20 is: 185,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,920.70 : 311,881.05 = 123,721.20 : x
  2. Step 2: Convert to fraction form
    207,920.70/311,881.05 = 123,721.20/x
  3. Step 3: Cross multiply
    207,920.70x = 311,881.05 × 123,721.20
  4. Step 4: Simplify right side
    207,920.70x = 38,586,297,763.26
  5. Step 5: Solve for x
    x = 38,586,297,763.26/207,920.70
  6. Step 6: Final answer
    x = 185,581.80

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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.