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Finding the Fourth Proportional to 125.33, 172.82 and 107.91

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Solution

The fourth proportional to 125.33, 172.82 and 107.91 is: 148.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.33 : 172.82 = 107.91 : x
  2. Step 2: Convert to fraction form
    125.33/172.82 = 107.91/x
  3. Step 3: Cross multiply
    125.33x = 172.82 × 107.91
  4. Step 4: Simplify right side
    125.33x = 18,649.28
  5. Step 5: Solve for x
    x = 18,649.28/125.33
  6. Step 6: Final answer
    x = 148.81

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.