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Finding the Fourth Proportional to 170.52, 235.01 and 128.98

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Solution

The fourth proportional to 170.52, 235.01 and 128.98 is: 177.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.52 : 235.01 = 128.98 : x
  2. Step 2: Convert to fraction form
    170.52/235.01 = 128.98/x
  3. Step 3: Cross multiply
    170.52x = 235.01 × 128.98
  4. Step 4: Simplify right side
    170.52x = 30,311.32
  5. Step 5: Solve for x
    x = 30,311.32/170.52
  6. Step 6: Final answer
    x = 177.76

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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.