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Finding the Fourth Proportional to 116.64, 175.60 and 91.29

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Solution

The fourth proportional to 116.64, 175.60 and 91.29 is: 137.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.64 : 175.60 = 91.29 : x
  2. Step 2: Convert to fraction form
    116.64/175.60 = 91.29/x
  3. Step 3: Cross multiply
    116.64x = 175.60 × 91.29
  4. Step 4: Simplify right side
    116.64x = 16,031.30
  5. Step 5: Solve for x
    x = 16,031.30/116.64
  6. Step 6: Final answer
    x = 137.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.