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Finding the Fourth Proportional to 101.24, 151.66 and 72.30

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Solution

The fourth proportional to 101.24, 151.66 and 72.30 is: 108.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.24 : 151.66 = 72.30 : x
  2. Step 2: Convert to fraction form
    101.24/151.66 = 72.30/x
  3. Step 3: Cross multiply
    101.24x = 151.66 × 72.30
  4. Step 4: Simplify right side
    101.24x = 10,965.02
  5. Step 5: Solve for x
    x = 10,965.02/101.24
  6. Step 6: Final answer
    x = 108.31

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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.