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Finding the Fourth Proportional to 272,020.60, 408,069.30 and 85,012.60

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Solution

The fourth proportional to 272,020.60, 408,069.30 and 85,012.60 is: 127,530.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,020.60 : 408,069.30 = 85,012.60 : x
  2. Step 2: Convert to fraction form
    272,020.60/408,069.30 = 85,012.60/x
  3. Step 3: Cross multiply
    272,020.60x = 408,069.30 × 85,012.60
  4. Step 4: Simplify right side
    272,020.60x = 34,691,032,173.18
  5. Step 5: Solve for x
    x = 34,691,032,173.18/272,020.60
  6. Step 6: Final answer
    x = 127,530.90

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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.