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Finding the Fourth Proportional to 145.50, 201.69 and 136.18

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Solution

The fourth proportional to 145.50, 201.69 and 136.18 is: 188.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.50 : 201.69 = 136.18 : x
  2. Step 2: Convert to fraction form
    145.50/201.69 = 136.18/x
  3. Step 3: Cross multiply
    145.50x = 201.69 × 136.18
  4. Step 4: Simplify right side
    145.50x = 27,466.40
  5. Step 5: Solve for x
    x = 27,466.40/145.50
  6. Step 6: Final answer
    x = 188.78

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.