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Finding the Fourth Proportional to 54.39, 74.94 and 51.03

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Solution

The fourth proportional to 54.39, 74.94 and 51.03 is: 70.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.39 : 74.94 = 51.03 : x
  2. Step 2: Convert to fraction form
    54.39/74.94 = 51.03/x
  3. Step 3: Cross multiply
    54.39x = 74.94 × 51.03
  4. Step 4: Simplify right side
    54.39x = 3,824.19
  5. Step 5: Solve for x
    x = 3,824.19/54.39
  6. Step 6: Final answer
    x = 70.31

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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.