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Finding the Fourth Proportional to 272,445.84, 408,704.48 and 90,016.05

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Solution

The fourth proportional to 272,445.84, 408,704.48 and 90,016.05 is: 135,035.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,445.84 : 408,704.48 = 90,016.05 : x
  2. Step 2: Convert to fraction form
    272,445.84/408,704.48 = 90,016.05/x
  3. Step 3: Cross multiply
    272,445.84x = 408,704.48 × 90,016.05
  4. Step 4: Simplify right side
    272,445.84x = 36,789,962,906.90
  5. Step 5: Solve for x
    x = 36,789,962,906.90/272,445.84
  6. Step 6: Final answer
    x = 135,035.88

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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.