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Finding the Fourth Proportional to 77.16, 116.19 and 67.13

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Solution

The fourth proportional to 77.16, 116.19 and 67.13 is: 101.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.16 : 116.19 = 67.13 : x
  2. Step 2: Convert to fraction form
    77.16/116.19 = 67.13/x
  3. Step 3: Cross multiply
    77.16x = 116.19 × 67.13
  4. Step 4: Simplify right side
    77.16x = 7,800.42
  5. Step 5: Solve for x
    x = 7,800.42/77.16
  6. Step 6: Final answer
    x = 101.10

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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.