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Finding the Fourth Proportional to 55.86, 83.79 and 51.54

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Solution

The fourth proportional to 55.86, 83.79 and 51.54 is: 77.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.86 : 83.79 = 51.54 : x
  2. Step 2: Convert to fraction form
    55.86/83.79 = 51.54/x
  3. Step 3: Cross multiply
    55.86x = 83.79 × 51.54
  4. Step 4: Simplify right side
    55.86x = 4,318.54
  5. Step 5: Solve for x
    x = 4,318.54/55.86
  6. Step 6: Final answer
    x = 77.31

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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.