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Finding the Fourth Proportional to 101.23, 150.97 and 91.51

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Solution

The fourth proportional to 101.23, 150.97 and 91.51 is: 136.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.23 : 150.97 = 91.51 : x
  2. Step 2: Convert to fraction form
    101.23/150.97 = 91.51/x
  3. Step 3: Cross multiply
    101.23x = 150.97 × 91.51
  4. Step 4: Simplify right side
    101.23x = 13,814.81
  5. Step 5: Solve for x
    x = 13,814.81/101.23
  6. Step 6: Final answer
    x = 136.47

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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.