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Finding the Fourth Proportional to 83,999.80, 126,096.90 and 48,489.40

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Solution

The fourth proportional to 83,999.80, 126,096.90 and 48,489.40 is: 72,790.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,999.80 : 126,096.90 = 48,489.40 : x
  2. Step 2: Convert to fraction form
    83,999.80/126,096.90 = 48,489.40/x
  3. Step 3: Cross multiply
    83,999.80x = 126,096.90 × 48,489.40
  4. Step 4: Simplify right side
    83,999.80x = 6,114,363,022.86
  5. Step 5: Solve for x
    x = 6,114,363,022.86/83,999.80
  6. Step 6: Final answer
    x = 72,790.21

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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.