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Finding the Fourth Proportional to 272,493.75, 408,806.28 and 85,505.25

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Solution

The fourth proportional to 272,493.75, 408,806.28 and 85,505.25 is: 128,278.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,493.75 : 408,806.28 = 85,505.25 : x
  2. Step 2: Convert to fraction form
    272,493.75/408,806.28 = 85,505.25/x
  3. Step 3: Cross multiply
    272,493.75x = 408,806.28 × 85,505.25
  4. Step 4: Simplify right side
    272,493.75x = 34,955,083,172.97
  5. Step 5: Solve for x
    x = 34,955,083,172.97/272,493.75
  6. Step 6: Final answer
    x = 128,278.48

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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.