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Finding the Fourth Proportional to 175.42, 242.29 and 142.80

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Solution

The fourth proportional to 175.42, 242.29 and 142.80 is: 197.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.42 : 242.29 = 142.80 : x
  2. Step 2: Convert to fraction form
    175.42/242.29 = 142.80/x
  3. Step 3: Cross multiply
    175.42x = 242.29 × 142.80
  4. Step 4: Simplify right side
    175.42x = 34,599.01
  5. Step 5: Solve for x
    x = 34,599.01/175.42
  6. Step 6: Final answer
    x = 197.24

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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.