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Finding the Fourth Proportional to 125.50, 172.92 and 88.56

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Solution

The fourth proportional to 125.50, 172.92 and 88.56 is: 122.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.50 : 172.92 = 88.56 : x
  2. Step 2: Convert to fraction form
    125.50/172.92 = 88.56/x
  3. Step 3: Cross multiply
    125.50x = 172.92 × 88.56
  4. Step 4: Simplify right side
    125.50x = 15,313.80
  5. Step 5: Solve for x
    x = 15,313.80/125.50
  6. Step 6: Final answer
    x = 122.02

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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.