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Finding the Fourth Proportional to 71,689.11, 107,536.11 and 19,098.64

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Solution

The fourth proportional to 71,689.11, 107,536.11 and 19,098.64 is: 28,648.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,689.11 : 107,536.11 = 19,098.64 : x
  2. Step 2: Convert to fraction form
    71,689.11/107,536.11 = 19,098.64/x
  3. Step 3: Cross multiply
    71,689.11x = 107,536.11 × 19,098.64
  4. Step 4: Simplify right side
    71,689.11x = 2,053,793,451.89
  5. Step 5: Solve for x
    x = 2,053,793,451.89/71,689.11
  6. Step 6: Final answer
    x = 28,648.61

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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.