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Finding the Fourth Proportional to 101.69, 152.36 and 82.40

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Solution

The fourth proportional to 101.69, 152.36 and 82.40 is: 123.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.69 : 152.36 = 82.40 : x
  2. Step 2: Convert to fraction form
    101.69/152.36 = 82.40/x
  3. Step 3: Cross multiply
    101.69x = 152.36 × 82.40
  4. Step 4: Simplify right side
    101.69x = 12,553.29
  5. Step 5: Solve for x
    x = 12,553.29/101.69
  6. Step 6: Final answer
    x = 123.45

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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.