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Finding the Fourth Proportional to 83,116.26, 124,674.39 and 20,786.76

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Solution

The fourth proportional to 83,116.26, 124,674.39 and 20,786.76 is: 31,180.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,116.26 : 124,674.39 = 20,786.76 : x
  2. Step 2: Convert to fraction form
    83,116.26/124,674.39 = 20,786.76/x
  3. Step 3: Cross multiply
    83,116.26x = 124,674.39 × 20,786.76
  4. Step 4: Simplify right side
    83,116.26x = 2,591,576,623.08
  5. Step 5: Solve for x
    x = 2,591,576,623.08/83,116.26
  6. Step 6: Final answer
    x = 31,180.14

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1.5x scale

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.