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Finding the Fourth Proportional to 236.16, 354.24 and 91.91

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Solution

The fourth proportional to 236.16, 354.24 and 91.91 is: 137.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.16 : 354.24 = 91.91 : x
  2. Step 2: Convert to fraction form
    236.16/354.24 = 91.91/x
  3. Step 3: Cross multiply
    236.16x = 354.24 × 91.91
  4. Step 4: Simplify right side
    236.16x = 32,557.74
  5. Step 5: Solve for x
    x = 32,557.74/236.16
  6. Step 6: Final answer
    x = 137.87

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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.