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Finding the Fourth Proportional to 149.10, 205.75 and 93.84

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Solution

The fourth proportional to 149.10, 205.75 and 93.84 is: 129.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.10 : 205.75 = 93.84 : x
  2. Step 2: Convert to fraction form
    149.10/205.75 = 93.84/x
  3. Step 3: Cross multiply
    149.10x = 205.75 × 93.84
  4. Step 4: Simplify right side
    149.10x = 19,307.58
  5. Step 5: Solve for x
    x = 19,307.58/149.10
  6. Step 6: Final answer
    x = 129.49

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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.