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Finding the Fourth Proportional to 125.19, 172.26 and 122.01

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Solution

The fourth proportional to 125.19, 172.26 and 122.01 is: 167.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.19 : 172.26 = 122.01 : x
  2. Step 2: Convert to fraction form
    125.19/172.26 = 122.01/x
  3. Step 3: Cross multiply
    125.19x = 172.26 × 122.01
  4. Step 4: Simplify right side
    125.19x = 21,017.44
  5. Step 5: Solve for x
    x = 21,017.44/125.19
  6. Step 6: Final answer
    x = 167.88

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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.