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Finding the Fourth Proportional to 161.53, 242.29 and 51.84

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Solution

The fourth proportional to 161.53, 242.29 and 51.84 is: 77.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.53 : 242.29 = 51.84 : x
  2. Step 2: Convert to fraction form
    161.53/242.29 = 51.84/x
  3. Step 3: Cross multiply
    161.53x = 242.29 × 51.84
  4. Step 4: Simplify right side
    161.53x = 12,560.38
  5. Step 5: Solve for x
    x = 12,560.38/161.53
  6. Step 6: Final answer
    x = 77.76

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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.