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Finding the Fourth Proportional to 40,747.80, 61,121.70 and 34,186.80

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Solution

The fourth proportional to 40,747.80, 61,121.70 and 34,186.80 is: 51,280.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,747.80 : 61,121.70 = 34,186.80 : x
  2. Step 2: Convert to fraction form
    40,747.80/61,121.70 = 34,186.80/x
  3. Step 3: Cross multiply
    40,747.80x = 61,121.70 × 34,186.80
  4. Step 4: Simplify right side
    40,747.80x = 2,089,555,333.56
  5. Step 5: Solve for x
    x = 2,089,555,333.56/40,747.80
  6. Step 6: Final answer
    x = 51,280.20

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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.