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Finding the Fourth Proportional to 190.97, 263.55 and 121.00

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Solution

The fourth proportional to 190.97, 263.55 and 121.00 is: 166.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.97 : 263.55 = 121.00 : x
  2. Step 2: Convert to fraction form
    190.97/263.55 = 121.00/x
  3. Step 3: Cross multiply
    190.97x = 263.55 × 121.00
  4. Step 4: Simplify right side
    190.97x = 31,888.89
  5. Step 5: Solve for x
    x = 31,888.89/190.97
  6. Step 6: Final answer
    x = 166.98

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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.