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Finding the Fourth Proportional to 131.64, 196.32 and 127.80

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Solution

The fourth proportional to 131.64, 196.32 and 127.80 is: 190.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.64 : 196.32 = 127.80 : x
  2. Step 2: Convert to fraction form
    131.64/196.32 = 127.80/x
  3. Step 3: Cross multiply
    131.64x = 196.32 × 127.80
  4. Step 4: Simplify right side
    131.64x = 25,089.70
  5. Step 5: Solve for x
    x = 25,089.70/131.64
  6. Step 6: Final answer
    x = 190.59

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