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Finding the Fourth Proportional to 85,287.87, 127,868.63 and 40,872.33

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Solution

The fourth proportional to 85,287.87, 127,868.63 and 40,872.33 is: 61,278.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,287.87 : 127,868.63 = 40,872.33 : x
  2. Step 2: Convert to fraction form
    85,287.87/127,868.63 = 40,872.33/x
  3. Step 3: Cross multiply
    85,287.87x = 127,868.63 × 40,872.33
  4. Step 4: Simplify right side
    85,287.87x = 5,226,288,637.65
  5. Step 5: Solve for x
    x = 5,226,288,637.65/85,287.87
  6. Step 6: Final answer
    x = 61,278.22

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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.