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Finding the Fourth Proportional to 49,474.80, 74,255.40 and 39,589.20

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Solution

The fourth proportional to 49,474.80, 74,255.40 and 39,589.20 is: 59,418.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,474.80 : 74,255.40 = 39,589.20 : x
  2. Step 2: Convert to fraction form
    49,474.80/74,255.40 = 39,589.20/x
  3. Step 3: Cross multiply
    49,474.80x = 74,255.40 × 39,589.20
  4. Step 4: Simplify right side
    49,474.80x = 2,939,711,881.68
  5. Step 5: Solve for x
    x = 2,939,711,881.68/49,474.80
  6. Step 6: Final answer
    x = 59,418.37

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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.