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Finding the Fourth Proportional to 65,891.57, 98,843.42 and 21,518.55

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Solution

The fourth proportional to 65,891.57, 98,843.42 and 21,518.55 is: 32,279.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,891.57 : 98,843.42 = 21,518.55 : x
  2. Step 2: Convert to fraction form
    65,891.57/98,843.42 = 21,518.55/x
  3. Step 3: Cross multiply
    65,891.57x = 98,843.42 × 21,518.55
  4. Step 4: Simplify right side
    65,891.57x = 2,126,967,048.54
  5. Step 5: Solve for x
    x = 2,126,967,048.54/65,891.57
  6. Step 6: Final answer
    x = 32,279.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.