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Finding the Fourth Proportional to 125.73, 172.38 and 125.58

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Solution

The fourth proportional to 125.73, 172.38 and 125.58 is: 172.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.73 : 172.38 = 125.58 : x
  2. Step 2: Convert to fraction form
    125.73/172.38 = 125.58/x
  3. Step 3: Cross multiply
    125.73x = 172.38 × 125.58
  4. Step 4: Simplify right side
    125.73x = 21,647.48
  5. Step 5: Solve for x
    x = 21,647.48/125.73
  6. Step 6: Final answer
    x = 172.17

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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.