Home / 258,120.80-387,230.16-89,634.56

Finding the Fourth Proportional to 258,120.80, 387,230.16 and 89,634.56

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Solution

The fourth proportional to 258,120.80, 387,230.16 and 89,634.56 is: 134,468.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,120.80 : 387,230.16 = 89,634.56 : x
  2. Step 2: Convert to fraction form
    258,120.80/387,230.16 = 89,634.56/x
  3. Step 3: Cross multiply
    258,120.80x = 387,230.16 × 89,634.56
  4. Step 4: Simplify right side
    258,120.80x = 34,709,205,010.33
  5. Step 5: Solve for x
    x = 34,709,205,010.33/258,120.80
  6. Step 6: Final answer
    x = 134,468.84

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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.