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Finding the Fourth Proportional to 71,809.30, 107,717.97 and 21,891.01

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Solution

The fourth proportional to 71,809.30, 107,717.97 and 21,891.01 is: 32,837.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,809.30 : 107,717.97 = 21,891.01 : x
  2. Step 2: Convert to fraction form
    71,809.30/107,717.97 = 21,891.01/x
  3. Step 3: Cross multiply
    71,809.30x = 107,717.97 × 21,891.01
  4. Step 4: Simplify right side
    71,809.30x = 2,358,055,158.45
  5. Step 5: Solve for x
    x = 2,358,055,158.45/71,809.30
  6. Step 6: Final answer
    x = 32,837.74

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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.