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Finding the Fourth Proportional to 117,855.53, 162,229.86 and 102,721.89

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Solution

The fourth proportional to 117,855.53, 162,229.86 and 102,721.89 is: 141,398.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,855.53 : 162,229.86 = 102,721.89 : x
  2. Step 2: Convert to fraction form
    117,855.53/162,229.86 = 102,721.89/x
  3. Step 3: Cross multiply
    117,855.53x = 162,229.86 × 102,721.89
  4. Step 4: Simplify right side
    117,855.53x = 16,664,557,833.64
  5. Step 5: Solve for x
    x = 16,664,557,833.64/117,855.53
  6. Step 6: Final answer
    x = 141,398.19

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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.