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Finding the Fourth Proportional to 71,799.30, 107,682.48 and 21,185.28

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Solution

The fourth proportional to 71,799.30, 107,682.48 and 21,185.28 is: 31,773.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,799.30 : 107,682.48 = 21,185.28 : x
  2. Step 2: Convert to fraction form
    71,799.30/107,682.48 = 21,185.28/x
  3. Step 3: Cross multiply
    71,799.30x = 107,682.48 × 21,185.28
  4. Step 4: Simplify right side
    71,799.30x = 2,281,283,489.89
  5. Step 5: Solve for x
    x = 2,281,283,489.89/71,799.30
  6. Step 6: Final answer
    x = 31,773.06

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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.