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Finding the Fourth Proportional to 55.77, 77.03 and 41.81

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Solution

The fourth proportional to 55.77, 77.03 and 41.81 is: 57.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.77 : 77.03 = 41.81 : x
  2. Step 2: Convert to fraction form
    55.77/77.03 = 41.81/x
  3. Step 3: Cross multiply
    55.77x = 77.03 × 41.81
  4. Step 4: Simplify right side
    55.77x = 3,220.03
  5. Step 5: Solve for x
    x = 3,220.03/55.77
  6. Step 6: Final answer
    x = 57.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.