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Finding the Fourth Proportional to 101.19, 151.50 and 77.07

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Solution

The fourth proportional to 101.19, 151.50 and 77.07 is: 115.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.19 : 151.50 = 77.07 : x
  2. Step 2: Convert to fraction form
    101.19/151.50 = 77.07/x
  3. Step 3: Cross multiply
    101.19x = 151.50 × 77.07
  4. Step 4: Simplify right side
    101.19x = 11,676.11
  5. Step 5: Solve for x
    x = 11,676.11/101.19
  6. Step 6: Final answer
    x = 115.39

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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.