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Finding the Fourth Proportional to 170.72, 235.60 and 93.10

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Solution

The fourth proportional to 170.72, 235.60 and 93.10 is: 128.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.72 : 235.60 = 93.10 : x
  2. Step 2: Convert to fraction form
    170.72/235.60 = 93.10/x
  3. Step 3: Cross multiply
    170.72x = 235.60 × 93.10
  4. Step 4: Simplify right side
    170.72x = 21,933.54
  5. Step 5: Solve for x
    x = 21,933.54/170.72
  6. Step 6: Final answer
    x = 128.47

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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.