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Finding the Fourth Proportional to 105.68, 157.44 and 100.50

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Solution

The fourth proportional to 105.68, 157.44 and 100.50 is: 149.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.68 : 157.44 = 100.50 : x
  2. Step 2: Convert to fraction form
    105.68/157.44 = 100.50/x
  3. Step 3: Cross multiply
    105.68x = 157.44 × 100.50
  4. Step 4: Simplify right side
    105.68x = 15,822.72
  5. Step 5: Solve for x
    x = 15,822.72/105.68
  6. Step 6: Final answer
    x = 149.73

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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.