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Finding the Fourth Proportional to 144,021.53, 198,734.64 and 79,489.58

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Solution

The fourth proportional to 144,021.53, 198,734.64 and 79,489.58 is: 109,687.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,021.53 : 198,734.64 = 79,489.58 : x
  2. Step 2: Convert to fraction form
    144,021.53/198,734.64 = 79,489.58/x
  3. Step 3: Cross multiply
    144,021.53x = 198,734.64 × 79,489.58
  4. Step 4: Simplify right side
    144,021.53x = 15,797,331,773.29
  5. Step 5: Solve for x
    x = 15,797,331,773.29/144,021.53
  6. Step 6: Final answer
    x = 109,687.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.