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Finding the Fourth Proportional to 117.77, 176.70 and 109.06

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Solution

The fourth proportional to 117.77, 176.70 and 109.06 is: 163.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.77 : 176.70 = 109.06 : x
  2. Step 2: Convert to fraction form
    117.77/176.70 = 109.06/x
  3. Step 3: Cross multiply
    117.77x = 176.70 × 109.06
  4. Step 4: Simplify right side
    117.77x = 19,270.90
  5. Step 5: Solve for x
    x = 19,270.90/117.77
  6. Step 6: Final answer
    x = 163.63

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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.