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Finding the Fourth Proportional to 72,237.15, 108,361.17 and 19,647.09

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Solution

The fourth proportional to 72,237.15, 108,361.17 and 19,647.09 is: 29,472.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,237.15 : 108,361.17 = 19,647.09 : x
  2. Step 2: Convert to fraction form
    72,237.15/108,361.17 = 19,647.09/x
  3. Step 3: Cross multiply
    72,237.15x = 108,361.17 × 19,647.09
  4. Step 4: Simplify right side
    72,237.15x = 2,128,981,659.50
  5. Step 5: Solve for x
    x = 2,128,981,659.50/72,237.15
  6. Step 6: Final answer
    x = 29,472.12

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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.