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Finding the Fourth Proportional to 194.16, 268.08 and 120.48

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Solution

The fourth proportional to 194.16, 268.08 and 120.48 is: 166.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.16 : 268.08 = 120.48 : x
  2. Step 2: Convert to fraction form
    194.16/268.08 = 120.48/x
  3. Step 3: Cross multiply
    194.16x = 268.08 × 120.48
  4. Step 4: Simplify right side
    194.16x = 32,298.28
  5. Step 5: Solve for x
    x = 32,298.28/194.16
  6. Step 6: Final answer
    x = 166.35

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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.