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Finding the Fourth Proportional to 127.21, 175.50 and 82.99

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Solution

The fourth proportional to 127.21, 175.50 and 82.99 is: 114.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.21 : 175.50 = 82.99 : x
  2. Step 2: Convert to fraction form
    127.21/175.50 = 82.99/x
  3. Step 3: Cross multiply
    127.21x = 175.50 × 82.99
  4. Step 4: Simplify right side
    127.21x = 14,564.61
  5. Step 5: Solve for x
    x = 14,564.61/127.21
  6. Step 6: Final answer
    x = 114.49

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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.