Home / 115.20-172.67-50.18

Finding the Fourth Proportional to 115.20, 172.67 and 50.18

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Solution

The fourth proportional to 115.20, 172.67 and 50.18 is: 75.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.20 : 172.67 = 50.18 : x
  2. Step 2: Convert to fraction form
    115.20/172.67 = 50.18/x
  3. Step 3: Cross multiply
    115.20x = 172.67 × 50.18
  4. Step 4: Simplify right side
    115.20x = 8,663.47
  5. Step 5: Solve for x
    x = 8,663.47/115.20
  6. Step 6: Final answer
    x = 75.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.