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Finding the Fourth Proportional to 127.62, 190.40 and 107.46

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Solution

The fourth proportional to 127.62, 190.40 and 107.46 is: 160.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.62 : 190.40 = 107.46 : x
  2. Step 2: Convert to fraction form
    127.62/190.40 = 107.46/x
  3. Step 3: Cross multiply
    127.62x = 190.40 × 107.46
  4. Step 4: Simplify right side
    127.62x = 20,459.85
  5. Step 5: Solve for x
    x = 20,459.85/127.62
  6. Step 6: Final answer
    x = 160.32

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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.