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Finding the Fourth Proportional to 92.58, 138.93 and 54.03

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Solution

The fourth proportional to 92.58, 138.93 and 54.03 is: 81.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.58 : 138.93 = 54.03 : x
  2. Step 2: Convert to fraction form
    92.58/138.93 = 54.03/x
  3. Step 3: Cross multiply
    92.58x = 138.93 × 54.03
  4. Step 4: Simplify right side
    92.58x = 7,506.39
  5. Step 5: Solve for x
    x = 7,506.39/92.58
  6. Step 6: Final answer
    x = 81.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.