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Finding the Fourth Proportional to 149.58, 206.50 and 97.20

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Solution

The fourth proportional to 149.58, 206.50 and 97.20 is: 134.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.58 : 206.50 = 97.20 : x
  2. Step 2: Convert to fraction form
    149.58/206.50 = 97.20/x
  3. Step 3: Cross multiply
    149.58x = 206.50 × 97.20
  4. Step 4: Simplify right side
    149.58x = 20,071.80
  5. Step 5: Solve for x
    x = 20,071.80/149.58
  6. Step 6: Final answer
    x = 134.19

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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.