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Finding the Fourth Proportional to 272,499.56, 408,766.62 and 85,518.44

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Solution

The fourth proportional to 272,499.56, 408,766.62 and 85,518.44 is: 128,283.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,499.56 : 408,766.62 = 85,518.44 : x
  2. Step 2: Convert to fraction form
    272,499.56/408,766.62 = 85,518.44/x
  3. Step 3: Cross multiply
    272,499.56x = 408,766.62 × 85,518.44
  4. Step 4: Simplify right side
    272,499.56x = 34,957,083,666.47
  5. Step 5: Solve for x
    x = 34,957,083,666.47/272,499.56
  6. Step 6: Final answer
    x = 128,283.08

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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.