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Finding the Fourth Proportional to 149.23, 206.01 and 91

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Solution

The fourth proportional to 149.23, 206.01 and 91 is: 125.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.23 : 206.01 = 91 : x
  2. Step 2: Convert to fraction form
    149.23/206.01 = 91/x
  3. Step 3: Cross multiply
    149.23x = 206.01 × 91
  4. Step 4: Simplify right side
    149.23x = 18,746.91
  5. Step 5: Solve for x
    x = 18,746.91/149.23
  6. Step 6: Final answer
    x = 125.62

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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.