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Finding the Fourth Proportional to 131.60, 181.16 and 112.16

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Solution

The fourth proportional to 131.60, 181.16 and 112.16 is: 154.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.60 : 181.16 = 112.16 : x
  2. Step 2: Convert to fraction form
    131.60/181.16 = 112.16/x
  3. Step 3: Cross multiply
    131.60x = 181.16 × 112.16
  4. Step 4: Simplify right side
    131.60x = 20,318.91
  5. Step 5: Solve for x
    x = 20,318.91/131.60
  6. Step 6: Final answer
    x = 154.40

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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.