Home / 84,116.76-126,138.21-31,489.34

Finding the Fourth Proportional to 84,116.76, 126,138.21 and 31,489.34

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Solution

The fourth proportional to 84,116.76, 126,138.21 and 31,489.34 is: 47,220.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,116.76 : 126,138.21 = 31,489.34 : x
  2. Step 2: Convert to fraction form
    84,116.76/126,138.21 = 31,489.34/x
  3. Step 3: Cross multiply
    84,116.76x = 126,138.21 × 31,489.34
  4. Step 4: Simplify right side
    84,116.76x = 3,972,008,350.99
  5. Step 5: Solve for x
    x = 3,972,008,350.99/84,116.76
  6. Step 6: Final answer
    x = 47,220.18

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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.