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Finding the Fourth Proportional to 130.49, 196.61 and 118.16

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Solution

The fourth proportional to 130.49, 196.61 and 118.16 is: 178.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.49 : 196.61 = 118.16 : x
  2. Step 2: Convert to fraction form
    130.49/196.61 = 118.16/x
  3. Step 3: Cross multiply
    130.49x = 196.61 × 118.16
  4. Step 4: Simplify right side
    130.49x = 23,230.53
  5. Step 5: Solve for x
    x = 23,230.53/130.49
  6. Step 6: Final answer
    x = 178.02

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.