Home / 84,324.50-126,474-31,721.76

Finding the Fourth Proportional to 84,324.50, 126,474 and 31,721.76

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Solution

The fourth proportional to 84,324.50, 126,474 and 31,721.76 is: 47,577.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,324.50 : 126,474 = 31,721.76 : x
  2. Step 2: Convert to fraction form
    84,324.50/126,474 = 31,721.76/x
  3. Step 3: Cross multiply
    84,324.50x = 126,474 × 31,721.76
  4. Step 4: Simplify right side
    84,324.50x = 4,011,977,874.24
  5. Step 5: Solve for x
    x = 4,011,977,874.24/84,324.50
  6. Step 6: Final answer
    x = 47,577.84

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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.