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Finding the Fourth Proportional to 127, 175.16 and 108.64

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Solution

The fourth proportional to 127, 175.16 and 108.64 is: 149.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    127 : 175.16 = 108.64 : x
  2. Step 2: Convert to fraction form
    127/175.16 = 108.64/x
  3. Step 3: Cross multiply
    127x = 175.16 × 108.64
  4. Step 4: Simplify right side
    127x = 19,029.38
  5. Step 5: Solve for x
    x = 19,029.38/127
  6. Step 6: Final answer
    x = 149.84

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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.