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Finding the Fourth Proportional to 125.46, 172.08 and 118.49

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Solution

The fourth proportional to 125.46, 172.08 and 118.49 is: 162.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.46 : 172.08 = 118.49 : x
  2. Step 2: Convert to fraction form
    125.46/172.08 = 118.49/x
  3. Step 3: Cross multiply
    125.46x = 172.08 × 118.49
  4. Step 4: Simplify right side
    125.46x = 20,388.90
  5. Step 5: Solve for x
    x = 20,388.90/125.46
  6. Step 6: Final answer
    x = 162.51

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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.