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Finding the Fourth Proportional to 83,131.40, 124,775.40 and 43,716.80

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Solution

The fourth proportional to 83,131.40, 124,775.40 and 43,716.80 is: 65,616.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,131.40 : 124,775.40 = 43,716.80 : x
  2. Step 2: Convert to fraction form
    83,131.40/124,775.40 = 43,716.80/x
  3. Step 3: Cross multiply
    83,131.40x = 124,775.40 × 43,716.80
  4. Step 4: Simplify right side
    83,131.40x = 5,454,781,206.72
  5. Step 5: Solve for x
    x = 5,454,781,206.72/83,131.40
  6. Step 6: Final answer
    x = 65,616.38

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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.