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Finding the Fourth Proportional to 94.46, 130.10 and 78.89

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Solution

The fourth proportional to 94.46, 130.10 and 78.89 is: 108.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.46 : 130.10 = 78.89 : x
  2. Step 2: Convert to fraction form
    94.46/130.10 = 78.89/x
  3. Step 3: Cross multiply
    94.46x = 130.10 × 78.89
  4. Step 4: Simplify right side
    94.46x = 10,262.54
  5. Step 5: Solve for x
    x = 10,262.54/94.46
  6. Step 6: Final answer
    x = 108.65

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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.