Home / 155,040.80-213,965.76-87,080

Finding the Fourth Proportional to 155,040.80, 213,965.76 and 87,080

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Solution

The fourth proportional to 155,040.80, 213,965.76 and 87,080 is: 120,175.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,040.80 : 213,965.76 = 87,080 : x
  2. Step 2: Convert to fraction form
    155,040.80/213,965.76 = 87,080/x
  3. Step 3: Cross multiply
    155,040.80x = 213,965.76 × 87,080
  4. Step 4: Simplify right side
    155,040.80x = 18,632,138,380.80
  5. Step 5: Solve for x
    x = 18,632,138,380.80/155,040.80
  6. Step 6: Final answer
    x = 120,175.71

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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.