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Finding the Fourth Proportional to 149.10, 205.75 and 93.07

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Solution

The fourth proportional to 149.10, 205.75 and 93.07 is: 128.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.10 : 205.75 = 93.07 : x
  2. Step 2: Convert to fraction form
    149.10/205.75 = 93.07/x
  3. Step 3: Cross multiply
    149.10x = 205.75 × 93.07
  4. Step 4: Simplify right side
    149.10x = 19,149.15
  5. Step 5: Solve for x
    x = 19,149.15/149.10
  6. Step 6: Final answer
    x = 128.43

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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.