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Finding the Fourth Proportional to 65,853.20, 98,769.73 and 21,479.87

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Solution

The fourth proportional to 65,853.20, 98,769.73 and 21,479.87 is: 32,216.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,853.20 : 98,769.73 = 21,479.87 : x
  2. Step 2: Convert to fraction form
    65,853.20/98,769.73 = 21,479.87/x
  3. Step 3: Cross multiply
    65,853.20x = 98,769.73 × 21,479.87
  4. Step 4: Simplify right side
    65,853.20x = 2,121,560,960.34
  5. Step 5: Solve for x
    x = 2,121,560,960.34/65,853.20
  6. Step 6: Final answer
    x = 32,216.52

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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.