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Finding the Fourth Proportional to 258,317.85, 387,653.10 and 89,836.49

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Solution

The fourth proportional to 258,317.85, 387,653.10 and 89,836.49 is: 134,816.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,317.85 : 387,653.10 = 89,836.49 : x
  2. Step 2: Convert to fraction form
    258,317.85/387,653.10 = 89,836.49/x
  3. Step 3: Cross multiply
    258,317.85x = 387,653.10 × 89,836.49
  4. Step 4: Simplify right side
    258,317.85x = 34,825,394,537.03
  5. Step 5: Solve for x
    x = 34,825,394,537.03/258,317.85
  6. Step 6: Final answer
    x = 134,816.06

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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.