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Finding the Fourth Proportional to 272,481.60, 408,722.40 and 85,492.80

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Solution

The fourth proportional to 272,481.60, 408,722.40 and 85,492.80 is: 128,239.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,481.60 : 408,722.40 = 85,492.80 : x
  2. Step 2: Convert to fraction form
    272,481.60/408,722.40 = 85,492.80/x
  3. Step 3: Cross multiply
    272,481.60x = 408,722.40 × 85,492.80
  4. Step 4: Simplify right side
    272,481.60x = 34,942,822,398.72
  5. Step 5: Solve for x
    x = 34,942,822,398.72/272,481.60
  6. Step 6: Final answer
    x = 128,239.20

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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.