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Finding the Fourth Proportional to 159,615.75, 220,279.67 and 87,995.65

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Solution

The fourth proportional to 159,615.75, 220,279.67 and 87,995.65 is: 121,439.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,615.75 : 220,279.67 = 87,995.65 : x
  2. Step 2: Convert to fraction form
    159,615.75/220,279.67 = 87,995.65/x
  3. Step 3: Cross multiply
    159,615.75x = 220,279.67 × 87,995.65
  4. Step 4: Simplify right side
    159,615.75x = 19,383,652,743.44
  5. Step 5: Solve for x
    x = 19,383,652,743.44/159,615.75
  6. Step 6: Final answer
    x = 121,439.47

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1.5x scale

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.