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Finding the Fourth Proportional to 131.70, 181.66 and 94.79

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Solution

The fourth proportional to 131.70, 181.66 and 94.79 is: 130.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.70 : 181.66 = 94.79 : x
  2. Step 2: Convert to fraction form
    131.70/181.66 = 94.79/x
  3. Step 3: Cross multiply
    131.70x = 181.66 × 94.79
  4. Step 4: Simplify right side
    131.70x = 17,219.55
  5. Step 5: Solve for x
    x = 17,219.55/131.70
  6. Step 6: Final answer
    x = 130.75

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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.