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Finding the Fourth Proportional to 272,468.76, 408,768.76 and 85,480.26

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Solution

The fourth proportional to 272,468.76, 408,768.76 and 85,480.26 is: 128,240.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,468.76 : 408,768.76 = 85,480.26 : x
  2. Step 2: Convert to fraction form
    272,468.76/408,768.76 = 85,480.26/x
  3. Step 3: Cross multiply
    272,468.76x = 408,768.76 × 85,480.26
  4. Step 4: Simplify right side
    272,468.76x = 34,941,659,884.68
  5. Step 5: Solve for x
    x = 34,941,659,884.68/272,468.76
  6. Step 6: Final answer
    x = 128,240.98

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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.