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Finding the Fourth Proportional to 137.07, 205.28 and 104.53

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Solution

The fourth proportional to 137.07, 205.28 and 104.53 is: 156.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.07 : 205.28 = 104.53 : x
  2. Step 2: Convert to fraction form
    137.07/205.28 = 104.53/x
  3. Step 3: Cross multiply
    137.07x = 205.28 × 104.53
  4. Step 4: Simplify right side
    137.07x = 21,458.69
  5. Step 5: Solve for x
    x = 21,458.69/137.07
  6. Step 6: Final answer
    x = 156.55

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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.