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Finding the Fourth Proportional to 101.88, 152.46 and 74.79

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Solution

The fourth proportional to 101.88, 152.46 and 74.79 is: 111.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.88 : 152.46 = 74.79 : x
  2. Step 2: Convert to fraction form
    101.88/152.46 = 74.79/x
  3. Step 3: Cross multiply
    101.88x = 152.46 × 74.79
  4. Step 4: Simplify right side
    101.88x = 11,402.48
  5. Step 5: Solve for x
    x = 11,402.48/101.88
  6. Step 6: Final answer
    x = 111.92

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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.