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Finding the Fourth Proportional to 71,806.62, 107,725.46 and 21,885.40

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Solution

The fourth proportional to 71,806.62, 107,725.46 and 21,885.40 is: 32,832.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,806.62 : 107,725.46 = 21,885.40 : x
  2. Step 2: Convert to fraction form
    71,806.62/107,725.46 = 21,885.40/x
  3. Step 3: Cross multiply
    71,806.62x = 107,725.46 × 21,885.40
  4. Step 4: Simplify right side
    71,806.62x = 2,357,614,782.28
  5. Step 5: Solve for x
    x = 2,357,614,782.28/71,806.62
  6. Step 6: Final answer
    x = 32,832.83

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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.