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Finding the Fourth Proportional to 127.86, 190.68 and 117.36

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Solution

The fourth proportional to 127.86, 190.68 and 117.36 is: 175.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.86 : 190.68 = 117.36 : x
  2. Step 2: Convert to fraction form
    127.86/190.68 = 117.36/x
  3. Step 3: Cross multiply
    127.86x = 190.68 × 117.36
  4. Step 4: Simplify right side
    127.86x = 22,378.20
  5. Step 5: Solve for x
    x = 22,378.20/127.86
  6. Step 6: Final answer
    x = 175.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.