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Finding the Fourth Proportional to 82,874.60, 124,311.90 and 38,486.60

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Solution

The fourth proportional to 82,874.60, 124,311.90 and 38,486.60 is: 57,729.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,874.60 : 124,311.90 = 38,486.60 : x
  2. Step 2: Convert to fraction form
    82,874.60/124,311.90 = 38,486.60/x
  3. Step 3: Cross multiply
    82,874.60x = 124,311.90 × 38,486.60
  4. Step 4: Simplify right side
    82,874.60x = 4,784,342,370.54
  5. Step 5: Solve for x
    x = 4,784,342,370.54/82,874.60
  6. Step 6: Final answer
    x = 57,729.90

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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.