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Finding the Fourth Proportional to 105.71, 157.30 and 105.35

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Solution

The fourth proportional to 105.71, 157.30 and 105.35 is: 156.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.71 : 157.30 = 105.35 : x
  2. Step 2: Convert to fraction form
    105.71/157.30 = 105.35/x
  3. Step 3: Cross multiply
    105.71x = 157.30 × 105.35
  4. Step 4: Simplify right side
    105.71x = 16,571.56
  5. Step 5: Solve for x
    x = 16,571.56/105.71
  6. Step 6: Final answer
    x = 156.76

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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.