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Finding the Fourth Proportional to 101.12, 152.52 and 90.56

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Solution

The fourth proportional to 101.12, 152.52 and 90.56 is: 136.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.12 : 152.52 = 90.56 : x
  2. Step 2: Convert to fraction form
    101.12/152.52 = 90.56/x
  3. Step 3: Cross multiply
    101.12x = 152.52 × 90.56
  4. Step 4: Simplify right side
    101.12x = 13,812.21
  5. Step 5: Solve for x
    x = 13,812.21/101.12
  6. Step 6: Final answer
    x = 136.59

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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.