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Finding the Fourth Proportional to 65,672.95, 98,474.19 and 20,685.91

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Solution

The fourth proportional to 65,672.95, 98,474.19 and 20,685.91 is: 31,017.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,672.95 : 98,474.19 = 20,685.91 : x
  2. Step 2: Convert to fraction form
    65,672.95/98,474.19 = 20,685.91/x
  3. Step 3: Cross multiply
    65,672.95x = 98,474.19 × 20,685.91
  4. Step 4: Simplify right side
    65,672.95x = 2,037,027,961.03
  5. Step 5: Solve for x
    x = 2,037,027,961.03/65,672.95
  6. Step 6: Final answer
    x = 31,017.76

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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.