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Finding the Fourth Proportional to 74,481.80, 111,722.70 and 61,359.80

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Solution

The fourth proportional to 74,481.80, 111,722.70 and 61,359.80 is: 92,039.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,481.80 : 111,722.70 = 61,359.80 : x
  2. Step 2: Convert to fraction form
    74,481.80/111,722.70 = 61,359.80/x
  3. Step 3: Cross multiply
    74,481.80x = 111,722.70 × 61,359.80
  4. Step 4: Simplify right side
    74,481.80x = 6,855,282,527.46
  5. Step 5: Solve for x
    x = 6,855,282,527.46/74,481.80
  6. Step 6: Final answer
    x = 92,039.70

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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.