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Finding the Fourth Proportional to 158,319.57, 218,481.59 and 86,698.97

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Solution

The fourth proportional to 158,319.57, 218,481.59 and 86,698.97 is: 119,644.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,319.57 : 218,481.59 = 86,698.97 : x
  2. Step 2: Convert to fraction form
    158,319.57/218,481.59 = 86,698.97/x
  3. Step 3: Cross multiply
    158,319.57x = 218,481.59 × 86,698.97
  4. Step 4: Simplify right side
    158,319.57x = 18,942,127,941.30
  5. Step 5: Solve for x
    x = 18,942,127,941.30/158,319.57
  6. Step 6: Final answer
    x = 119,644.89

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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.