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Finding the Fourth Proportional to 127.30, 175.66 and 72.04

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Solution

The fourth proportional to 127.30, 175.66 and 72.04 is: 99.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.30 : 175.66 = 72.04 : x
  2. Step 2: Convert to fraction form
    127.30/175.66 = 72.04/x
  3. Step 3: Cross multiply
    127.30x = 175.66 × 72.04
  4. Step 4: Simplify right side
    127.30x = 12,654.55
  5. Step 5: Solve for x
    x = 12,654.55/127.30
  6. Step 6: Final answer
    x = 99.41

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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.