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Finding the Fourth Proportional to 127.26, 175.60 and 71.99

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Solution

The fourth proportional to 127.26, 175.60 and 71.99 is: 99.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.26 : 175.60 = 71.99 : x
  2. Step 2: Convert to fraction form
    127.26/175.60 = 71.99/x
  3. Step 3: Cross multiply
    127.26x = 175.60 × 71.99
  4. Step 4: Simplify right side
    127.26x = 12,641.75
  5. Step 5: Solve for x
    x = 12,641.75/127.26
  6. Step 6: Final answer
    x = 99.34

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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.