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Finding the Fourth Proportional to 272,489.76, 408,708.72 and 85,468.32

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Solution

The fourth proportional to 272,489.76, 408,708.72 and 85,468.32 is: 128,194.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,489.76 : 408,708.72 = 85,468.32 : x
  2. Step 2: Convert to fraction form
    272,489.76/408,708.72 = 85,468.32/x
  3. Step 3: Cross multiply
    272,489.76x = 408,708.72 × 85,468.32
  4. Step 4: Simplify right side
    272,489.76x = 34,931,647,667.75
  5. Step 5: Solve for x
    x = 34,931,647,667.75/272,489.76
  6. Step 6: Final answer
    x = 128,194.35

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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.