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Finding the Fourth Proportional to 127.21, 190.83 and 73.06

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Solution

The fourth proportional to 127.21, 190.83 and 73.06 is: 109.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.21 : 190.83 = 73.06 : x
  2. Step 2: Convert to fraction form
    127.21/190.83 = 73.06/x
  3. Step 3: Cross multiply
    127.21x = 190.83 × 73.06
  4. Step 4: Simplify right side
    127.21x = 13,942.04
  5. Step 5: Solve for x
    x = 13,942.04/127.21
  6. Step 6: Final answer
    x = 109.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.