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Finding the Fourth Proportional to 54.36, 74.93 and 37.89

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Solution

The fourth proportional to 54.36, 74.93 and 37.89 is: 52.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.36 : 74.93 = 37.89 : x
  2. Step 2: Convert to fraction form
    54.36/74.93 = 37.89/x
  3. Step 3: Cross multiply
    54.36x = 74.93 × 37.89
  4. Step 4: Simplify right side
    54.36x = 2,838.91
  5. Step 5: Solve for x
    x = 2,838.91/54.36
  6. Step 6: Final answer
    x = 52.22

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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.