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Finding the Fourth Proportional to 80.06, 119.61 and 70.47

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Solution

The fourth proportional to 80.06, 119.61 and 70.47 is: 105.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.06 : 119.61 = 70.47 : x
  2. Step 2: Convert to fraction form
    80.06/119.61 = 70.47/x
  3. Step 3: Cross multiply
    80.06x = 119.61 × 70.47
  4. Step 4: Simplify right side
    80.06x = 8,428.92
  5. Step 5: Solve for x
    x = 8,428.92/80.06
  6. Step 6: Final answer
    x = 105.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.