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Finding the Fourth Proportional to 125.10, 172.69 and 92.45

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Solution

The fourth proportional to 125.10, 172.69 and 92.45 is: 127.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.10 : 172.69 = 92.45 : x
  2. Step 2: Convert to fraction form
    125.10/172.69 = 92.45/x
  3. Step 3: Cross multiply
    125.10x = 172.69 × 92.45
  4. Step 4: Simplify right side
    125.10x = 15,965.39
  5. Step 5: Solve for x
    x = 15,965.39/125.10
  6. Step 6: Final answer
    x = 127.62

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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.