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Finding the Fourth Proportional to 174.13, 260.90 and 128.23

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Solution

The fourth proportional to 174.13, 260.90 and 128.23 is: 192.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.13 : 260.90 = 128.23 : x
  2. Step 2: Convert to fraction form
    174.13/260.90 = 128.23/x
  3. Step 3: Cross multiply
    174.13x = 260.90 × 128.23
  4. Step 4: Simplify right side
    174.13x = 33,453.26
  5. Step 5: Solve for x
    x = 33,453.26/174.13
  6. Step 6: Final answer
    x = 192.12

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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.