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Finding the Fourth Proportional to 107.79, 161.11 and 93.97

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Solution

The fourth proportional to 107.79, 161.11 and 93.97 is: 140.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.79 : 161.11 = 93.97 : x
  2. Step 2: Convert to fraction form
    107.79/161.11 = 93.97/x
  3. Step 3: Cross multiply
    107.79x = 161.11 × 93.97
  4. Step 4: Simplify right side
    107.79x = 15,139.51
  5. Step 5: Solve for x
    x = 15,139.51/107.79
  6. Step 6: Final answer
    x = 140.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.