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Finding the Fourth Proportional to 137.65, 189.79 and 93.34

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Solution

The fourth proportional to 137.65, 189.79 and 93.34 is: 128.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.65 : 189.79 = 93.34 : x
  2. Step 2: Convert to fraction form
    137.65/189.79 = 93.34/x
  3. Step 3: Cross multiply
    137.65x = 189.79 × 93.34
  4. Step 4: Simplify right side
    137.65x = 17,714.88
  5. Step 5: Solve for x
    x = 17,714.88/137.65
  6. Step 6: Final answer
    x = 128.70

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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.