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Finding the Fourth Proportional to 55.89, 83.41 and 53.66

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Solution

The fourth proportional to 55.89, 83.41 and 53.66 is: 80.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.89 : 83.41 = 53.66 : x
  2. Step 2: Convert to fraction form
    55.89/83.41 = 53.66/x
  3. Step 3: Cross multiply
    55.89x = 83.41 × 53.66
  4. Step 4: Simplify right side
    55.89x = 4,475.85
  5. Step 5: Solve for x
    x = 4,475.85/55.89
  6. Step 6: Final answer
    x = 80.08

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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.