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Finding the Fourth Proportional to 55.66, 76.62 and 48.74

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Solution

The fourth proportional to 55.66, 76.62 and 48.74 is: 67.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.66 : 76.62 = 48.74 : x
  2. Step 2: Convert to fraction form
    55.66/76.62 = 48.74/x
  3. Step 3: Cross multiply
    55.66x = 76.62 × 48.74
  4. Step 4: Simplify right side
    55.66x = 3,734.46
  5. Step 5: Solve for x
    x = 3,734.46/55.66
  6. Step 6: Final answer
    x = 67.09

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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.