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Finding the Fourth Proportional to 117,163.70, 161,691.79 and 68,767.72

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Solution

The fourth proportional to 117,163.70, 161,691.79 and 68,767.72 is: 94,902.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,163.70 : 161,691.79 = 68,767.72 : x
  2. Step 2: Convert to fraction form
    117,163.70/161,691.79 = 68,767.72/x
  3. Step 3: Cross multiply
    117,163.70x = 161,691.79 × 68,767.72
  4. Step 4: Simplify right side
    117,163.70x = 11,119,175,741.02
  5. Step 5: Solve for x
    x = 11,119,175,741.02/117,163.70
  6. Step 6: Final answer
    x = 94,902.91

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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.