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Finding the Fourth Proportional to 125.62, 172.23 and 125.42

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Solution

The fourth proportional to 125.62, 172.23 and 125.42 is: 171.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.62 : 172.23 = 125.42 : x
  2. Step 2: Convert to fraction form
    125.62/172.23 = 125.42/x
  3. Step 3: Cross multiply
    125.62x = 172.23 × 125.42
  4. Step 4: Simplify right side
    125.62x = 21,599.76
  5. Step 5: Solve for x
    x = 21,599.76/125.62
  6. Step 6: Final answer
    x = 171.95

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.