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Finding the Fourth Proportional to 149.14, 205.74 and 100.03

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Solution

The fourth proportional to 149.14, 205.74 and 100.03 is: 138.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.14 : 205.74 = 100.03 : x
  2. Step 2: Convert to fraction form
    149.14/205.74 = 100.03/x
  3. Step 3: Cross multiply
    149.14x = 205.74 × 100.03
  4. Step 4: Simplify right side
    149.14x = 20,580.75
  5. Step 5: Solve for x
    x = 20,580.75/149.14
  6. Step 6: Final answer
    x = 138.00

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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.