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Finding the Fourth Proportional to 92.52, 138.54 and 86.10

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Solution

The fourth proportional to 92.52, 138.54 and 86.10 is: 128.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.52 : 138.54 = 86.10 : x
  2. Step 2: Convert to fraction form
    92.52/138.54 = 86.10/x
  3. Step 3: Cross multiply
    92.52x = 138.54 × 86.10
  4. Step 4: Simplify right side
    92.52x = 11,928.29
  5. Step 5: Solve for x
    x = 11,928.29/92.52
  6. Step 6: Final answer
    x = 128.93

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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.