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Finding the Fourth Proportional to 131.94, 181.50 and 118.86

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Solution

The fourth proportional to 131.94, 181.50 and 118.86 is: 163.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.94 : 181.50 = 118.86 : x
  2. Step 2: Convert to fraction form
    131.94/181.50 = 118.86/x
  3. Step 3: Cross multiply
    131.94x = 181.50 × 118.86
  4. Step 4: Simplify right side
    131.94x = 21,573.09
  5. Step 5: Solve for x
    x = 21,573.09/131.94
  6. Step 6: Final answer
    x = 163.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.