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Finding the Fourth Proportional to 125.23, 172.74 and 73.48

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Solution

The fourth proportional to 125.23, 172.74 and 73.48 is: 101.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.23 : 172.74 = 73.48 : x
  2. Step 2: Convert to fraction form
    125.23/172.74 = 73.48/x
  3. Step 3: Cross multiply
    125.23x = 172.74 × 73.48
  4. Step 4: Simplify right side
    125.23x = 12,692.94
  5. Step 5: Solve for x
    x = 12,692.94/125.23
  6. Step 6: Final answer
    x = 101.36

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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.