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Finding the Fourth Proportional to 101.82, 152.47 and 65.28

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Solution

The fourth proportional to 101.82, 152.47 and 65.28 is: 97.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.82 : 152.47 = 65.28 : x
  2. Step 2: Convert to fraction form
    101.82/152.47 = 65.28/x
  3. Step 3: Cross multiply
    101.82x = 152.47 × 65.28
  4. Step 4: Simplify right side
    101.82x = 9,953.24
  5. Step 5: Solve for x
    x = 9,953.24/101.82
  6. Step 6: Final answer
    x = 97.75

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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.