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Finding the Fourth Proportional to 83,129.18, 124,693.80 and 20,799.68

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Solution

The fourth proportional to 83,129.18, 124,693.80 and 20,799.68 is: 31,199.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,129.18 : 124,693.80 = 20,799.68 : x
  2. Step 2: Convert to fraction form
    83,129.18/124,693.80 = 20,799.68/x
  3. Step 3: Cross multiply
    83,129.18x = 124,693.80 × 20,799.68
  4. Step 4: Simplify right side
    83,129.18x = 2,593,591,137.98
  5. Step 5: Solve for x
    x = 2,593,591,137.98/83,129.18
  6. Step 6: Final answer
    x = 31,199.53

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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.