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Finding the Fourth Proportional to 107.17, 160.78 and 61.43

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Solution

The fourth proportional to 107.17, 160.78 and 61.43 is: 92.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.17 : 160.78 = 61.43 : x
  2. Step 2: Convert to fraction form
    107.17/160.78 = 61.43/x
  3. Step 3: Cross multiply
    107.17x = 160.78 × 61.43
  4. Step 4: Simplify right side
    107.17x = 9,876.72
  5. Step 5: Solve for x
    x = 9,876.72/107.17
  6. Step 6: Final answer
    x = 92.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.