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Finding the Fourth Proportional to 272,557.81, 408,854.04 and 85,576.69

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Solution

The fourth proportional to 272,557.81, 408,854.04 and 85,576.69 is: 128,370.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,557.81 : 408,854.04 = 85,576.69 : x
  2. Step 2: Convert to fraction form
    272,557.81/408,854.04 = 85,576.69/x
  3. Step 3: Cross multiply
    272,557.81x = 408,854.04 × 85,576.69
  4. Step 4: Simplify right side
    272,557.81x = 34,988,375,436.33
  5. Step 5: Solve for x
    x = 34,988,375,436.33/272,557.81
  6. Step 6: Final answer
    x = 128,370.47

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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.