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Finding the Fourth Proportional to 158,452.88, 218,665.04 and 86,835.78

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Solution

The fourth proportional to 158,452.88, 218,665.04 and 86,835.78 is: 119,833.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,452.88 : 218,665.04 = 86,835.78 : x
  2. Step 2: Convert to fraction form
    158,452.88/218,665.04 = 86,835.78/x
  3. Step 3: Cross multiply
    158,452.88x = 218,665.04 × 86,835.78
  4. Step 4: Simplify right side
    158,452.88x = 18,987,948,872.95
  5. Step 5: Solve for x
    x = 18,987,948,872.95/158,452.88
  6. Step 6: Final answer
    x = 119,833.41

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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.