Home / 71,839.08-99,128.75-40,003.65

Finding the Fourth Proportional to 71,839.08, 99,128.75 and 40,003.65

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Solution

The fourth proportional to 71,839.08, 99,128.75 and 40,003.65 is: 55,199.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,839.08 : 99,128.75 = 40,003.65 : x
  2. Step 2: Convert to fraction form
    71,839.08/99,128.75 = 40,003.65/x
  3. Step 3: Cross multiply
    71,839.08x = 99,128.75 × 40,003.65
  4. Step 4: Simplify right side
    71,839.08x = 3,965,511,619.92
  5. Step 5: Solve for x
    x = 3,965,511,619.92/71,839.08
  6. Step 6: Final answer
    x = 55,199.92

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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.