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Finding the Fourth Proportional to 137.84, 207 and 130.28

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Solution

The fourth proportional to 137.84, 207 and 130.28 is: 195.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.84 : 207 = 130.28 : x
  2. Step 2: Convert to fraction form
    137.84/207 = 130.28/x
  3. Step 3: Cross multiply
    137.84x = 207 × 130.28
  4. Step 4: Simplify right side
    137.84x = 26,967.96
  5. Step 5: Solve for x
    x = 26,967.96/137.84
  6. Step 6: Final answer
    x = 195.65

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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.