Home / 84,123.20-126,184.28-20,943

Finding the Fourth Proportional to 84,123.20, 126,184.28 and 20,943

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Solution

The fourth proportional to 84,123.20, 126,184.28 and 20,943 is: 31,414.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,123.20 : 126,184.28 = 20,943 : x
  2. Step 2: Convert to fraction form
    84,123.20/126,184.28 = 20,943/x
  3. Step 3: Cross multiply
    84,123.20x = 126,184.28 × 20,943
  4. Step 4: Simplify right side
    84,123.20x = 2,642,677,376.04
  5. Step 5: Solve for x
    x = 2,642,677,376.04/84,123.20
  6. Step 6: Final answer
    x = 31,414.37

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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.