Home / 272,619.28-408,993.60-85,630.78

Finding the Fourth Proportional to 272,619.28, 408,993.60 and 85,630.78

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Solution

The fourth proportional to 272,619.28, 408,993.60 and 85,630.78 is: 128,466.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,619.28 : 408,993.60 = 85,630.78 : x
  2. Step 2: Convert to fraction form
    272,619.28/408,993.60 = 85,630.78/x
  3. Step 3: Cross multiply
    272,619.28x = 408,993.60 × 85,630.78
  4. Step 4: Simplify right side
    272,619.28x = 35,022,438,938.04
  5. Step 5: Solve for x
    x = 35,022,438,938.04/272,619.28
  6. Step 6: Final answer
    x = 128,466.48

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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.