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Finding the Fourth Proportional to 170.63, 235.41 and 104.21

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Solution

The fourth proportional to 170.63, 235.41 and 104.21 is: 143.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.63 : 235.41 = 104.21 : x
  2. Step 2: Convert to fraction form
    170.63/235.41 = 104.21/x
  3. Step 3: Cross multiply
    170.63x = 235.41 × 104.21
  4. Step 4: Simplify right side
    170.63x = 24,530.90
  5. Step 5: Solve for x
    x = 24,530.90/170.63
  6. Step 6: Final answer
    x = 143.77

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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.