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Finding the Fourth Proportional to 105.09, 156.78 and 94.83

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Solution

The fourth proportional to 105.09, 156.78 and 94.83 is: 141.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.09 : 156.78 = 94.83 : x
  2. Step 2: Convert to fraction form
    105.09/156.78 = 94.83/x
  3. Step 3: Cross multiply
    105.09x = 156.78 × 94.83
  4. Step 4: Simplify right side
    105.09x = 14,867.45
  5. Step 5: Solve for x
    x = 14,867.45/105.09
  6. Step 6: Final answer
    x = 141.47

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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.