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Finding the Fourth Proportional to 80.04, 109.75 and 72.24

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Solution

The fourth proportional to 80.04, 109.75 and 72.24 is: 99.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.04 : 109.75 = 72.24 : x
  2. Step 2: Convert to fraction form
    80.04/109.75 = 72.24/x
  3. Step 3: Cross multiply
    80.04x = 109.75 × 72.24
  4. Step 4: Simplify right side
    80.04x = 7,928.34
  5. Step 5: Solve for x
    x = 7,928.34/80.04
  6. Step 6: Final answer
    x = 99.05

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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.