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Finding the Fourth Proportional to 125.56, 172.83 and 92.31

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Solution

The fourth proportional to 125.56, 172.83 and 92.31 is: 127.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.56 : 172.83 = 92.31 : x
  2. Step 2: Convert to fraction form
    125.56/172.83 = 92.31/x
  3. Step 3: Cross multiply
    125.56x = 172.83 × 92.31
  4. Step 4: Simplify right side
    125.56x = 15,953.94
  5. Step 5: Solve for x
    x = 15,953.94/125.56
  6. Step 6: Final answer
    x = 127.06

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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.