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Finding the Fourth Proportional to 86,791.93, 130,198.38 and 30,620.51

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Solution

The fourth proportional to 86,791.93, 130,198.38 and 30,620.51 is: 45,934.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,791.93 : 130,198.38 = 30,620.51 : x
  2. Step 2: Convert to fraction form
    86,791.93/130,198.38 = 30,620.51/x
  3. Step 3: Cross multiply
    86,791.93x = 130,198.38 × 30,620.51
  4. Step 4: Simplify right side
    86,791.93x = 3,986,740,519.20
  5. Step 5: Solve for x
    x = 3,986,740,519.20/86,791.93
  6. Step 6: Final answer
    x = 45,934.46

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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.