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Finding the Fourth Proportional to 45.36, 67.61 and 43.35

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Solution

The fourth proportional to 45.36, 67.61 and 43.35 is: 64.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.36 : 67.61 = 43.35 : x
  2. Step 2: Convert to fraction form
    45.36/67.61 = 43.35/x
  3. Step 3: Cross multiply
    45.36x = 67.61 × 43.35
  4. Step 4: Simplify right side
    45.36x = 2,930.34
  5. Step 5: Solve for x
    x = 2,930.34/45.36
  6. Step 6: Final answer
    x = 64.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.