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Finding the Fourth Proportional to 272,129.60, 408,232.80 and 85,121.60

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Solution

The fourth proportional to 272,129.60, 408,232.80 and 85,121.60 is: 127,694.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,129.60 : 408,232.80 = 85,121.60 : x
  2. Step 2: Convert to fraction form
    272,129.60/408,232.80 = 85,121.60/x
  3. Step 3: Cross multiply
    272,129.60x = 408,232.80 × 85,121.60
  4. Step 4: Simplify right side
    272,129.60x = 34,749,429,108.48
  5. Step 5: Solve for x
    x = 34,749,429,108.48/272,129.60
  6. Step 6: Final answer
    x = 127,694.41

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1.5x scale

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.