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Finding the Fourth Proportional to 51.36, 70.72 and 36.64

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Solution

The fourth proportional to 51.36, 70.72 and 36.64 is: 50.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.36 : 70.72 = 36.64 : x
  2. Step 2: Convert to fraction form
    51.36/70.72 = 36.64/x
  3. Step 3: Cross multiply
    51.36x = 70.72 × 36.64
  4. Step 4: Simplify right side
    51.36x = 2,591.18
  5. Step 5: Solve for x
    x = 2,591.18/51.36
  6. Step 6: Final answer
    x = 50.45

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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.