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Finding the Fourth Proportional to 65,806.29, 98,687.31 and 21,422.61

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Solution

The fourth proportional to 65,806.29, 98,687.31 and 21,422.61 is: 32,126.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,806.29 : 98,687.31 = 21,422.61 : x
  2. Step 2: Convert to fraction form
    65,806.29/98,687.31 = 21,422.61/x
  3. Step 3: Cross multiply
    65,806.29x = 98,687.31 × 21,422.61
  4. Step 4: Simplify right side
    65,806.29x = 2,114,139,754.08
  5. Step 5: Solve for x
    x = 2,114,139,754.08/65,806.29
  6. Step 6: Final answer
    x = 32,126.71

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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.