Home / 71,780.74-99,056.43-39,949.65

Finding the Fourth Proportional to 71,780.74, 99,056.43 and 39,949.65

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Solution

The fourth proportional to 71,780.74, 99,056.43 and 39,949.65 is: 55,129.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,780.74 : 99,056.43 = 39,949.65 : x
  2. Step 2: Convert to fraction form
    71,780.74/99,056.43 = 39,949.65/x
  3. Step 3: Cross multiply
    71,780.74x = 99,056.43 × 39,949.65
  4. Step 4: Simplify right side
    71,780.74x = 3,957,269,708.75
  5. Step 5: Solve for x
    x = 3,957,269,708.75/71,780.74
  6. Step 6: Final answer
    x = 55,129.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.