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Finding the Fourth Proportional to 65,708.72, 98,563.12 and 21,335.52

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Solution

The fourth proportional to 65,708.72, 98,563.12 and 21,335.52 is: 32,003.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,708.72 : 98,563.12 = 21,335.52 : x
  2. Step 2: Convert to fraction form
    65,708.72/98,563.12 = 21,335.52/x
  3. Step 3: Cross multiply
    65,708.72x = 98,563.12 × 21,335.52
  4. Step 4: Simplify right side
    65,708.72x = 2,102,895,418.02
  5. Step 5: Solve for x
    x = 2,102,895,418.02/65,708.72
  6. Step 6: Final answer
    x = 32,003.29

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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.