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Finding the Fourth Proportional to 101.46, 152.75 and 74.60

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Solution

The fourth proportional to 101.46, 152.75 and 74.60 is: 112.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.46 : 152.75 = 74.60 : x
  2. Step 2: Convert to fraction form
    101.46/152.75 = 74.60/x
  3. Step 3: Cross multiply
    101.46x = 152.75 × 74.60
  4. Step 4: Simplify right side
    101.46x = 11,395.15
  5. Step 5: Solve for x
    x = 11,395.15/101.46
  6. Step 6: Final answer
    x = 112.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.