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Finding the Fourth Proportional to 116.98, 175.40 and 80.46

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Solution

The fourth proportional to 116.98, 175.40 and 80.46 is: 120.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.98 : 175.40 = 80.46 : x
  2. Step 2: Convert to fraction form
    116.98/175.40 = 80.46/x
  3. Step 3: Cross multiply
    116.98x = 175.40 × 80.46
  4. Step 4: Simplify right side
    116.98x = 14,112.68
  5. Step 5: Solve for x
    x = 14,112.68/116.98
  6. Step 6: Final answer
    x = 120.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.