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Finding the Fourth Proportional to 65,988.44, 98,979.42 and 21,609.34

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Solution

The fourth proportional to 65,988.44, 98,979.42 and 21,609.34 is: 32,412.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,988.44 : 98,979.42 = 21,609.34 : x
  2. Step 2: Convert to fraction form
    65,988.44/98,979.42 = 21,609.34/x
  3. Step 3: Cross multiply
    65,988.44x = 98,979.42 × 21,609.34
  4. Step 4: Simplify right side
    65,988.44x = 2,138,879,939.78
  5. Step 5: Solve for x
    x = 2,138,879,939.78/65,988.44
  6. Step 6: Final answer
    x = 32,412.95

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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.