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Finding the Fourth Proportional to 163.41, 245.19 and 91.32

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Solution

The fourth proportional to 163.41, 245.19 and 91.32 is: 137.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.41 : 245.19 = 91.32 : x
  2. Step 2: Convert to fraction form
    163.41/245.19 = 91.32/x
  3. Step 3: Cross multiply
    163.41x = 245.19 × 91.32
  4. Step 4: Simplify right side
    163.41x = 22,390.75
  5. Step 5: Solve for x
    x = 22,390.75/163.41
  6. Step 6: Final answer
    x = 137.02

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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.