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Finding the Fourth Proportional to 272,576.25, 408,880.80 and 85,587.75

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Solution

The fourth proportional to 272,576.25, 408,880.80 and 85,587.75 is: 128,386.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,576.25 : 408,880.80 = 85,587.75 : x
  2. Step 2: Convert to fraction form
    272,576.25/408,880.80 = 85,587.75/x
  3. Step 3: Cross multiply
    272,576.25x = 408,880.80 × 85,587.75
  4. Step 4: Simplify right side
    272,576.25x = 34,995,187,690.20
  5. Step 5: Solve for x
    x = 34,995,187,690.20/272,576.25
  6. Step 6: Final answer
    x = 128,386.78

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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.