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Finding the Fourth Proportional to 127.60, 176.07 and 72.34

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Solution

The fourth proportional to 127.60, 176.07 and 72.34 is: 99.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.60 : 176.07 = 72.34 : x
  2. Step 2: Convert to fraction form
    127.60/176.07 = 72.34/x
  3. Step 3: Cross multiply
    127.60x = 176.07 × 72.34
  4. Step 4: Simplify right side
    127.60x = 12,736.73
  5. Step 5: Solve for x
    x = 12,736.73/127.60
  6. Step 6: Final answer
    x = 99.82

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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.