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Finding the Fourth Proportional to 131.60, 181.16 and 117.52

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Solution

The fourth proportional to 131.60, 181.16 and 117.52 is: 161.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.60 : 181.16 = 117.52 : x
  2. Step 2: Convert to fraction form
    131.60/181.16 = 117.52/x
  3. Step 3: Cross multiply
    131.60x = 181.16 × 117.52
  4. Step 4: Simplify right side
    131.60x = 21,289.92
  5. Step 5: Solve for x
    x = 21,289.92/131.60
  6. Step 6: Final answer
    x = 161.78

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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.