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Finding the Fourth Proportional to 190.07, 262.31 and 112.45

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Solution

The fourth proportional to 190.07, 262.31 and 112.45 is: 155.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.07 : 262.31 = 112.45 : x
  2. Step 2: Convert to fraction form
    190.07/262.31 = 112.45/x
  3. Step 3: Cross multiply
    190.07x = 262.31 × 112.45
  4. Step 4: Simplify right side
    190.07x = 29,494.89
  5. Step 5: Solve for x
    x = 29,494.89/190.07
  6. Step 6: Final answer
    x = 155.18

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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.