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Finding the Fourth Proportional to 149.47, 206.82 and 130.11

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Solution

The fourth proportional to 149.47, 206.82 and 130.11 is: 180.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.47 : 206.82 = 130.11 : x
  2. Step 2: Convert to fraction form
    149.47/206.82 = 130.11/x
  3. Step 3: Cross multiply
    149.47x = 206.82 × 130.11
  4. Step 4: Simplify right side
    149.47x = 26,908.03
  5. Step 5: Solve for x
    x = 26,908.03/149.47
  6. Step 6: Final answer
    x = 180.02

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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.