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Finding the Fourth Proportional to 135.01, 202.55 and 43.72

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Solution

The fourth proportional to 135.01, 202.55 and 43.72 is: 65.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.01 : 202.55 = 43.72 : x
  2. Step 2: Convert to fraction form
    135.01/202.55 = 43.72/x
  3. Step 3: Cross multiply
    135.01x = 202.55 × 43.72
  4. Step 4: Simplify right side
    135.01x = 8,855.49
  5. Step 5: Solve for x
    x = 8,855.49/135.01
  6. Step 6: Final answer
    x = 65.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.