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Finding the Fourth Proportional to 113.77, 170.84 and 79.08

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Solution

The fourth proportional to 113.77, 170.84 and 79.08 is: 118.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.77 : 170.84 = 79.08 : x
  2. Step 2: Convert to fraction form
    113.77/170.84 = 79.08/x
  3. Step 3: Cross multiply
    113.77x = 170.84 × 79.08
  4. Step 4: Simplify right side
    113.77x = 13,510.03
  5. Step 5: Solve for x
    x = 13,510.03/113.77
  6. Step 6: Final answer
    x = 118.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.