Home / 258,651.25-387,993.28-81,165.27

Finding the Fourth Proportional to 258,651.25, 387,993.28 and 81,165.27

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Solution

The fourth proportional to 258,651.25, 387,993.28 and 81,165.27 is: 121,753.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,651.25 : 387,993.28 = 81,165.27 : x
  2. Step 2: Convert to fraction form
    258,651.25/387,993.28 = 81,165.27/x
  3. Step 3: Cross multiply
    258,651.25x = 387,993.28 × 81,165.27
  4. Step 4: Simplify right side
    258,651.25x = 31,491,577,345.80
  5. Step 5: Solve for x
    x = 31,491,577,345.80/258,651.25
  6. Step 6: Final answer
    x = 121,753.05

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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.