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Finding the Fourth Proportional to 158,252.49, 218,388.78 and 86,636.97

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Solution

The fourth proportional to 158,252.49, 218,388.78 and 86,636.97 is: 119,559.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,252.49 : 218,388.78 = 86,636.97 : x
  2. Step 2: Convert to fraction form
    158,252.49/218,388.78 = 86,636.97/x
  3. Step 3: Cross multiply
    158,252.49x = 218,388.78 × 86,636.97
  4. Step 4: Simplify right side
    158,252.49x = 18,920,542,181.20
  5. Step 5: Solve for x
    x = 18,920,542,181.20/158,252.49
  6. Step 6: Final answer
    x = 119,559.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.