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Finding the Fourth Proportional to 137.00, 188.88 and 117.39

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Solution

The fourth proportional to 137.00, 188.88 and 117.39 is: 161.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.00 : 188.88 = 117.39 : x
  2. Step 2: Convert to fraction form
    137.00/188.88 = 117.39/x
  3. Step 3: Cross multiply
    137.00x = 188.88 × 117.39
  4. Step 4: Simplify right side
    137.00x = 22,172.62
  5. Step 5: Solve for x
    x = 22,172.62/137.00
  6. Step 6: Final answer
    x = 161.85

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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.