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Finding the Fourth Proportional to 113.29, 170.12 and 70.81

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Solution

The fourth proportional to 113.29, 170.12 and 70.81 is: 106.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.29 : 170.12 = 70.81 : x
  2. Step 2: Convert to fraction form
    113.29/170.12 = 70.81/x
  3. Step 3: Cross multiply
    113.29x = 170.12 × 70.81
  4. Step 4: Simplify right side
    113.29x = 12,044.99
  5. Step 5: Solve for x
    x = 12,044.99/113.29
  6. Step 6: Final answer
    x = 106.32

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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.