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Finding the Fourth Proportional to 101.80, 152.76 and 92.16

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Solution

The fourth proportional to 101.80, 152.76 and 92.16 is: 138.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.80 : 152.76 = 92.16 : x
  2. Step 2: Convert to fraction form
    101.80/152.76 = 92.16/x
  3. Step 3: Cross multiply
    101.80x = 152.76 × 92.16
  4. Step 4: Simplify right side
    101.80x = 14,078.36
  5. Step 5: Solve for x
    x = 14,078.36/101.80
  6. Step 6: Final answer
    x = 138.29

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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.