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Finding the Fourth Proportional to 65,908.58, 98,872.47 and 20,914.88

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Solution

The fourth proportional to 65,908.58, 98,872.47 and 20,914.88 is: 31,375.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,908.58 : 98,872.47 = 20,914.88 : x
  2. Step 2: Convert to fraction form
    65,908.58/98,872.47 = 20,914.88/x
  3. Step 3: Cross multiply
    65,908.58x = 98,872.47 × 20,914.88
  4. Step 4: Simplify right side
    65,908.58x = 2,067,905,350.99
  5. Step 5: Solve for x
    x = 2,067,905,350.99/65,908.58
  6. Step 6: Final answer
    x = 31,375.36

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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.