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Finding the Fourth Proportional to 116.83, 174.50 and 91.09

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Solution

The fourth proportional to 116.83, 174.50 and 91.09 is: 136.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.83 : 174.50 = 91.09 : x
  2. Step 2: Convert to fraction form
    116.83/174.50 = 91.09/x
  3. Step 3: Cross multiply
    116.83x = 174.50 × 91.09
  4. Step 4: Simplify right side
    116.83x = 15,895.21
  5. Step 5: Solve for x
    x = 15,895.21/116.83
  6. Step 6: Final answer
    x = 136.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.