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Finding the Fourth Proportional to 117,486.05, 161,721 and 101,404.38

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Solution

The fourth proportional to 117,486.05, 161,721 and 101,404.38 is: 139,584.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,486.05 : 161,721 = 101,404.38 : x
  2. Step 2: Convert to fraction form
    117,486.05/161,721 = 101,404.38/x
  3. Step 3: Cross multiply
    117,486.05x = 161,721 × 101,404.38
  4. Step 4: Simplify right side
    117,486.05x = 16,399,217,737.98
  5. Step 5: Solve for x
    x = 16,399,217,737.98/117,486.05
  6. Step 6: Final answer
    x = 139,584.38

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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.