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Finding the Fourth Proportional to 127.54, 175.98 and 72.28

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Solution

The fourth proportional to 127.54, 175.98 and 72.28 is: 99.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.54 : 175.98 = 72.28 : x
  2. Step 2: Convert to fraction form
    127.54/175.98 = 72.28/x
  3. Step 3: Cross multiply
    127.54x = 175.98 × 72.28
  4. Step 4: Simplify right side
    127.54x = 12,719.39
  5. Step 5: Solve for x
    x = 12,719.39/127.54
  6. Step 6: Final answer
    x = 99.73

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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.