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Finding the Fourth Proportional to 80.16, 120.66 and 60.12

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Solution

The fourth proportional to 80.16, 120.66 and 60.12 is: 90.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.16 : 120.66 = 60.12 : x
  2. Step 2: Convert to fraction form
    80.16/120.66 = 60.12/x
  3. Step 3: Cross multiply
    80.16x = 120.66 × 60.12
  4. Step 4: Simplify right side
    80.16x = 7,254.08
  5. Step 5: Solve for x
    x = 7,254.08/80.16
  6. Step 6: Final answer
    x = 90.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.