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Finding the Fourth Proportional to 80.07, 110.38 and 56.69

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Solution

The fourth proportional to 80.07, 110.38 and 56.69 is: 78.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.07 : 110.38 = 56.69 : x
  2. Step 2: Convert to fraction form
    80.07/110.38 = 56.69/x
  3. Step 3: Cross multiply
    80.07x = 110.38 × 56.69
  4. Step 4: Simplify right side
    80.07x = 6,256.75
  5. Step 5: Solve for x
    x = 6,256.75/80.07
  6. Step 6: Final answer
    x = 78.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.