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Finding the Fourth Proportional to 71,722.40, 107,584.36 and 21,810.60

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Solution

The fourth proportional to 71,722.40, 107,584.36 and 21,810.60 is: 32,716.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,722.40 : 107,584.36 = 21,810.60 : x
  2. Step 2: Convert to fraction form
    71,722.40/107,584.36 = 21,810.60/x
  3. Step 3: Cross multiply
    71,722.40x = 107,584.36 × 21,810.60
  4. Step 4: Simplify right side
    71,722.40x = 2,346,479,442.22
  5. Step 5: Solve for x
    x = 2,346,479,442.22/71,722.40
  6. Step 6: Final answer
    x = 32,716.13

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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.