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Finding the Fourth Proportional to 54.07, 74.63 and 34.68

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Solution

The fourth proportional to 54.07, 74.63 and 34.68 is: 47.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.07 : 74.63 = 34.68 : x
  2. Step 2: Convert to fraction form
    54.07/74.63 = 34.68/x
  3. Step 3: Cross multiply
    54.07x = 74.63 × 34.68
  4. Step 4: Simplify right side
    54.07x = 2,588.17
  5. Step 5: Solve for x
    x = 2,588.17/54.07
  6. Step 6: Final answer
    x = 47.87

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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.