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Finding the Fourth Proportional to 194.14, 268.13 and 128.93

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Solution

The fourth proportional to 194.14, 268.13 and 128.93 is: 178.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.14 : 268.13 = 128.93 : x
  2. Step 2: Convert to fraction form
    194.14/268.13 = 128.93/x
  3. Step 3: Cross multiply
    194.14x = 268.13 × 128.93
  4. Step 4: Simplify right side
    194.14x = 34,570.00
  5. Step 5: Solve for x
    x = 34,570.00/194.14
  6. Step 6: Final answer
    x = 178.07

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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.