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Finding the Fourth Proportional to 72,141.11, 108,217.11 and 21,536.15

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Solution

The fourth proportional to 72,141.11, 108,217.11 and 21,536.15 is: 32,305.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,141.11 : 108,217.11 = 21,536.15 : x
  2. Step 2: Convert to fraction form
    72,141.11/108,217.11 = 21,536.15/x
  3. Step 3: Cross multiply
    72,141.11x = 108,217.11 × 21,536.15
  4. Step 4: Simplify right side
    72,141.11x = 2,330,579,372.44
  5. Step 5: Solve for x
    x = 2,330,579,372.44/72,141.11
  6. Step 6: Final answer
    x = 32,305.84

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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.