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Finding the Fourth Proportional to 55.51, 76.74 and 43.22

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Solution

The fourth proportional to 55.51, 76.74 and 43.22 is: 59.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.51 : 76.74 = 43.22 : x
  2. Step 2: Convert to fraction form
    55.51/76.74 = 43.22/x
  3. Step 3: Cross multiply
    55.51x = 76.74 × 43.22
  4. Step 4: Simplify right side
    55.51x = 3,316.70
  5. Step 5: Solve for x
    x = 3,316.70/55.51
  6. Step 6: Final answer
    x = 59.76

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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.