Home / 86,121.16-129,189.24-23,791.72

Finding the Fourth Proportional to 86,121.16, 129,189.24 and 23,791.72

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Solution

The fourth proportional to 86,121.16, 129,189.24 and 23,791.72 is: 35,689.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,121.16 : 129,189.24 = 23,791.72 : x
  2. Step 2: Convert to fraction form
    86,121.16/129,189.24 = 23,791.72/x
  3. Step 3: Cross multiply
    86,121.16x = 129,189.24 × 23,791.72
  4. Step 4: Simplify right side
    86,121.16x = 3,073,634,225.09
  5. Step 5: Solve for x
    x = 3,073,634,225.09/86,121.16
  6. Step 6: Final answer
    x = 35,689.65

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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.