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Finding the Fourth Proportional to 139.22, 207.56 and 130.41

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Solution

The fourth proportional to 139.22, 207.56 and 130.41 is: 194.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.22 : 207.56 = 130.41 : x
  2. Step 2: Convert to fraction form
    139.22/207.56 = 130.41/x
  3. Step 3: Cross multiply
    139.22x = 207.56 × 130.41
  4. Step 4: Simplify right side
    139.22x = 27,068.23
  5. Step 5: Solve for x
    x = 27,068.23/139.22
  6. Step 6: Final answer
    x = 194.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.