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Finding the Fourth Proportional to 94.37, 130.24 and 78.79

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Solution

The fourth proportional to 94.37, 130.24 and 78.79 is: 108.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.37 : 130.24 = 78.79 : x
  2. Step 2: Convert to fraction form
    94.37/130.24 = 78.79/x
  3. Step 3: Cross multiply
    94.37x = 130.24 × 78.79
  4. Step 4: Simplify right side
    94.37x = 10,261.63
  5. Step 5: Solve for x
    x = 10,261.63/94.37
  6. Step 6: Final answer
    x = 108.74

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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.