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Finding the Fourth Proportional to 134.65, 185.90 and 103.51

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Solution

The fourth proportional to 134.65, 185.90 and 103.51 is: 142.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.65 : 185.90 = 103.51 : x
  2. Step 2: Convert to fraction form
    134.65/185.90 = 103.51/x
  3. Step 3: Cross multiply
    134.65x = 185.90 × 103.51
  4. Step 4: Simplify right side
    134.65x = 19,241.76
  5. Step 5: Solve for x
    x = 19,241.76/134.65
  6. Step 6: Final answer
    x = 142.91

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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.