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Finding the Fourth Proportional to 131.46, 197.05 and 49.17

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Solution

The fourth proportional to 131.46, 197.05 and 49.17 is: 73.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.46 : 197.05 = 49.17 : x
  2. Step 2: Convert to fraction form
    131.46/197.05 = 49.17/x
  3. Step 3: Cross multiply
    131.46x = 197.05 × 49.17
  4. Step 4: Simplify right side
    131.46x = 9,688.95
  5. Step 5: Solve for x
    x = 9,688.95/131.46
  6. Step 6: Final answer
    x = 73.70

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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.