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Finding the Fourth Proportional to 158,169.74, 218,276.64 and 86,556.42

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Solution

The fourth proportional to 158,169.74, 218,276.64 and 86,556.42 is: 119,449.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,169.74 : 218,276.64 = 86,556.42 : x
  2. Step 2: Convert to fraction form
    158,169.74/218,276.64 = 86,556.42/x
  3. Step 3: Cross multiply
    158,169.74x = 218,276.64 × 86,556.42
  4. Step 4: Simplify right side
    158,169.74x = 18,893,244,528.03
  5. Step 5: Solve for x
    x = 18,893,244,528.03/158,169.74
  6. Step 6: Final answer
    x = 119,449.18

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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.