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Finding the Fourth Proportional to 103.83, 143.28 and 94.65

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Solution

The fourth proportional to 103.83, 143.28 and 94.65 is: 130.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.83 : 143.28 = 94.65 : x
  2. Step 2: Convert to fraction form
    103.83/143.28 = 94.65/x
  3. Step 3: Cross multiply
    103.83x = 143.28 × 94.65
  4. Step 4: Simplify right side
    103.83x = 13,561.45
  5. Step 5: Solve for x
    x = 13,561.45/103.83
  6. Step 6: Final answer
    x = 130.61

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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.