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Finding the Fourth Proportional to 101, 152.20 and 84.26

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Solution

The fourth proportional to 101, 152.20 and 84.26 is: 126.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    101 : 152.20 = 84.26 : x
  2. Step 2: Convert to fraction form
    101/152.20 = 84.26/x
  3. Step 3: Cross multiply
    101x = 152.20 × 84.26
  4. Step 4: Simplify right side
    101x = 12,824.37
  5. Step 5: Solve for x
    x = 12,824.37/101
  6. Step 6: Final answer
    x = 126.97

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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.