Home / 258,198.21-387,138.75-89,646.12

Finding the Fourth Proportional to 258,198.21, 387,138.75 and 89,646.12

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Solution

The fourth proportional to 258,198.21, 387,138.75 and 89,646.12 is: 134,414.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,198.21 : 387,138.75 = 89,646.12 : x
  2. Step 2: Convert to fraction form
    258,198.21/387,138.75 = 89,646.12/x
  3. Step 3: Cross multiply
    258,198.21x = 387,138.75 × 89,646.12
  4. Step 4: Simplify right side
    258,198.21x = 34,705,486,839.15
  5. Step 5: Solve for x
    x = 34,705,486,839.15/258,198.21
  6. Step 6: Final answer
    x = 134,414.13

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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.