Home / 258,536.25-387,804.49-81,057.11

Finding the Fourth Proportional to 258,536.25, 387,804.49 and 81,057.11

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Solution

The fourth proportional to 258,536.25, 387,804.49 and 81,057.11 is: 121,585.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,536.25 : 387,804.49 = 81,057.11 : x
  2. Step 2: Convert to fraction form
    258,536.25/387,804.49 = 81,057.11/x
  3. Step 3: Cross multiply
    258,536.25x = 387,804.49 × 81,057.11
  4. Step 4: Simplify right side
    258,536.25x = 31,434,309,062.76
  5. Step 5: Solve for x
    x = 31,434,309,062.76/258,536.25
  6. Step 6: Final answer
    x = 121,585.69

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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.