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Finding the Fourth Proportional to 131.56, 181.50 and 79.84

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Solution

The fourth proportional to 131.56, 181.50 and 79.84 is: 110.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.56 : 181.50 = 79.84 : x
  2. Step 2: Convert to fraction form
    131.56/181.50 = 79.84/x
  3. Step 3: Cross multiply
    131.56x = 181.50 × 79.84
  4. Step 4: Simplify right side
    131.56x = 14,490.96
  5. Step 5: Solve for x
    x = 14,490.96/131.56
  6. Step 6: Final answer
    x = 110.15

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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.