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Finding the Fourth Proportional to 131.40, 197.06 and 62.79

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Solution

The fourth proportional to 131.40, 197.06 and 62.79 is: 94.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.40 : 197.06 = 62.79 : x
  2. Step 2: Convert to fraction form
    131.40/197.06 = 62.79/x
  3. Step 3: Cross multiply
    131.40x = 197.06 × 62.79
  4. Step 4: Simplify right side
    131.40x = 12,373.08
  5. Step 5: Solve for x
    x = 12,373.08/131.40
  6. Step 6: Final answer
    x = 94.16

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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.