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Finding the Fourth Proportional to 55.53, 82.53 and 51.21

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Solution

The fourth proportional to 55.53, 82.53 and 51.21 is: 76.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.53 : 82.53 = 51.21 : x
  2. Step 2: Convert to fraction form
    55.53/82.53 = 51.21/x
  3. Step 3: Cross multiply
    55.53x = 82.53 × 51.21
  4. Step 4: Simplify right side
    55.53x = 4,226.36
  5. Step 5: Solve for x
    x = 4,226.36/55.53
  6. Step 6: Final answer
    x = 76.11

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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.