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Finding the Fourth Proportional to 137.15, 205.38 and 98.47

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Solution

The fourth proportional to 137.15, 205.38 and 98.47 is: 147.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.15 : 205.38 = 98.47 : x
  2. Step 2: Convert to fraction form
    137.15/205.38 = 98.47/x
  3. Step 3: Cross multiply
    137.15x = 205.38 × 98.47
  4. Step 4: Simplify right side
    137.15x = 20,223.77
  5. Step 5: Solve for x
    x = 20,223.77/137.15
  6. Step 6: Final answer
    x = 147.46

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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.