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Finding the Fourth Proportional to 127.20, 175.68 and 116.28

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Solution

The fourth proportional to 127.20, 175.68 and 116.28 is: 160.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.20 : 175.68 = 116.28 : x
  2. Step 2: Convert to fraction form
    127.20/175.68 = 116.28/x
  3. Step 3: Cross multiply
    127.20x = 175.68 × 116.28
  4. Step 4: Simplify right side
    127.20x = 20,428.07
  5. Step 5: Solve for x
    x = 20,428.07/127.20
  6. Step 6: Final answer
    x = 160.60

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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.