Home / 84,139.20-126,203.76-31,544.28

Finding the Fourth Proportional to 84,139.20, 126,203.76 and 31,544.28

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Solution

The fourth proportional to 84,139.20, 126,203.76 and 31,544.28 is: 47,314.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,139.20 : 126,203.76 = 31,544.28 : x
  2. Step 2: Convert to fraction form
    84,139.20/126,203.76 = 31,544.28/x
  3. Step 3: Cross multiply
    84,139.20x = 126,203.76 × 31,544.28
  4. Step 4: Simplify right side
    84,139.20x = 3,981,006,742.49
  5. Step 5: Solve for x
    x = 3,981,006,742.49/84,139.20
  6. Step 6: Final answer
    x = 47,314.53

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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.