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Finding the Fourth Proportional to 72,502.26, 108,754.62 and 19,911.39

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Solution

The fourth proportional to 72,502.26, 108,754.62 and 19,911.39 is: 29,867.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,502.26 : 108,754.62 = 19,911.39 : x
  2. Step 2: Convert to fraction form
    72,502.26/108,754.62 = 19,911.39/x
  3. Step 3: Cross multiply
    72,502.26x = 108,754.62 × 19,911.39
  4. Step 4: Simplify right side
    72,502.26x = 2,165,455,653.12
  5. Step 5: Solve for x
    x = 2,165,455,653.12/72,502.26
  6. Step 6: Final answer
    x = 29,867.42

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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.