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Finding the Fourth Proportional to 85,469.10, 127,912.05 and 85,469.10

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Solution

The fourth proportional to 85,469.10, 127,912.05 and 85,469.10 is: 127,912.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,469.10 : 127,912.05 = 85,469.10 : x
  2. Step 2: Convert to fraction form
    85,469.10/127,912.05 = 85,469.10/x
  3. Step 3: Cross multiply
    85,469.10x = 127,912.05 × 85,469.10
  4. Step 4: Simplify right side
    85,469.10x = 10,932,527,792.66
  5. Step 5: Solve for x
    x = 10,932,527,792.66/85,469.10
  6. Step 6: Final answer
    x = 127,912.05

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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.