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Finding the Fourth Proportional to 161.95, 243.08 and 118.07

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Solution

The fourth proportional to 161.95, 243.08 and 118.07 is: 177.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.95 : 243.08 = 118.07 : x
  2. Step 2: Convert to fraction form
    161.95/243.08 = 118.07/x
  3. Step 3: Cross multiply
    161.95x = 243.08 × 118.07
  4. Step 4: Simplify right side
    161.95x = 28,700.46
  5. Step 5: Solve for x
    x = 28,700.46/161.95
  6. Step 6: Final answer
    x = 177.22

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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.