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Finding the Fourth Proportional to 172.58, 258.54 and 95.42

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Solution

The fourth proportional to 172.58, 258.54 and 95.42 is: 142.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.58 : 258.54 = 95.42 : x
  2. Step 2: Convert to fraction form
    172.58/258.54 = 95.42/x
  3. Step 3: Cross multiply
    172.58x = 258.54 × 95.42
  4. Step 4: Simplify right side
    172.58x = 24,670.18
  5. Step 5: Solve for x
    x = 24,670.18/172.58
  6. Step 6: Final answer
    x = 142.95

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.