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Finding the Fourth Proportional to 65,512.80, 98,269.20 and 21,143.03

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Solution

The fourth proportional to 65,512.80, 98,269.20 and 21,143.03 is: 31,714.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,512.80 : 98,269.20 = 21,143.03 : x
  2. Step 2: Convert to fraction form
    65,512.80/98,269.20 = 21,143.03/x
  3. Step 3: Cross multiply
    65,512.80x = 98,269.20 × 21,143.03
  4. Step 4: Simplify right side
    65,512.80x = 2,077,708,152.33
  5. Step 5: Solve for x
    x = 2,077,708,152.33/65,512.80
  6. Step 6: Final answer
    x = 31,714.54

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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.