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Finding the Fourth Proportional to 101.85, 152.81 and 61.26

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Solution

The fourth proportional to 101.85, 152.81 and 61.26 is: 91.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.85 : 152.81 = 61.26 : x
  2. Step 2: Convert to fraction form
    101.85/152.81 = 61.26/x
  3. Step 3: Cross multiply
    101.85x = 152.81 × 61.26
  4. Step 4: Simplify right side
    101.85x = 9,360.83
  5. Step 5: Solve for x
    x = 9,360.83/101.85
  6. Step 6: Final answer
    x = 91.91

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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.