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Finding the Fourth Proportional to 127.07, 175.35 and 77.98

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Solution

The fourth proportional to 127.07, 175.35 and 77.98 is: 107.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.07 : 175.35 = 77.98 : x
  2. Step 2: Convert to fraction form
    127.07/175.35 = 77.98/x
  3. Step 3: Cross multiply
    127.07x = 175.35 × 77.98
  4. Step 4: Simplify right side
    127.07x = 13,673.40
  5. Step 5: Solve for x
    x = 13,673.40/127.07
  6. Step 6: Final answer
    x = 107.61

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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.