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Finding the Fourth Proportional to 115.90, 172.83 and 101.52

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Solution

The fourth proportional to 115.90, 172.83 and 101.52 is: 151.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.90 : 172.83 = 101.52 : x
  2. Step 2: Convert to fraction form
    115.90/172.83 = 101.52/x
  3. Step 3: Cross multiply
    115.90x = 172.83 × 101.52
  4. Step 4: Simplify right side
    115.90x = 17,546.08
  5. Step 5: Solve for x
    x = 17,546.08/115.90
  6. Step 6: Final answer
    x = 151.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.