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Finding the Fourth Proportional to 55.35, 82.86 and 45.56

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Solution

The fourth proportional to 55.35, 82.86 and 45.56 is: 68.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.35 : 82.86 = 45.56 : x
  2. Step 2: Convert to fraction form
    55.35/82.86 = 45.56/x
  3. Step 3: Cross multiply
    55.35x = 82.86 × 45.56
  4. Step 4: Simplify right side
    55.35x = 3,775.14
  5. Step 5: Solve for x
    x = 3,775.14/55.35
  6. Step 6: Final answer
    x = 68.20

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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.