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Finding the Fourth Proportional to 80.07, 109.88 and 73.18

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Solution

The fourth proportional to 80.07, 109.88 and 73.18 is: 100.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.07 : 109.88 = 73.18 : x
  2. Step 2: Convert to fraction form
    80.07/109.88 = 73.18/x
  3. Step 3: Cross multiply
    80.07x = 109.88 × 73.18
  4. Step 4: Simplify right side
    80.07x = 8,041.02
  5. Step 5: Solve for x
    x = 8,041.02/80.07
  6. Step 6: Final answer
    x = 100.42

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.