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Finding the Fourth Proportional to 190.70, 263.16 and 107.80

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Solution

The fourth proportional to 190.70, 263.16 and 107.80 is: 148.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.70 : 263.16 = 107.80 : x
  2. Step 2: Convert to fraction form
    190.70/263.16 = 107.80/x
  3. Step 3: Cross multiply
    190.70x = 263.16 × 107.80
  4. Step 4: Simplify right side
    190.70x = 28,368.65
  5. Step 5: Solve for x
    x = 28,368.65/190.70
  6. Step 6: Final answer
    x = 148.76

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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.