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Finding the Fourth Proportional to 272,475.75, 408,779.25 and 85,487.25

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Solution

The fourth proportional to 272,475.75, 408,779.25 and 85,487.25 is: 128,251.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,475.75 : 408,779.25 = 85,487.25 : x
  2. Step 2: Convert to fraction form
    272,475.75/408,779.25 = 85,487.25/x
  3. Step 3: Cross multiply
    272,475.75x = 408,779.25 × 85,487.25
  4. Step 4: Simplify right side
    272,475.75x = 34,945,413,939.56
  5. Step 5: Solve for x
    x = 34,945,413,939.56/272,475.75
  6. Step 6: Final answer
    x = 128,251.46

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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.