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Finding the Fourth Proportional to 83,268.60, 124,902.90 and 20,939.10

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Solution

The fourth proportional to 83,268.60, 124,902.90 and 20,939.10 is: 31,408.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,268.60 : 124,902.90 = 20,939.10 : x
  2. Step 2: Convert to fraction form
    83,268.60/124,902.90 = 20,939.10/x
  3. Step 3: Cross multiply
    83,268.60x = 124,902.90 × 20,939.10
  4. Step 4: Simplify right side
    83,268.60x = 2,615,354,313.39
  5. Step 5: Solve for x
    x = 2,615,354,313.39/83,268.60
  6. Step 6: Final answer
    x = 31,408.65

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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.