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Finding the Fourth Proportional to 92.72, 127.97 and 53.91

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Solution

The fourth proportional to 92.72, 127.97 and 53.91 is: 74.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.72 : 127.97 = 53.91 : x
  2. Step 2: Convert to fraction form
    92.72/127.97 = 53.91/x
  3. Step 3: Cross multiply
    92.72x = 127.97 × 53.91
  4. Step 4: Simplify right side
    92.72x = 6,899.00
  5. Step 5: Solve for x
    x = 6,899.00/92.72
  6. Step 6: Final answer
    x = 74.40

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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.