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Finding the Fourth Proportional to 94.80, 130.79 and 70.28

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Solution

The fourth proportional to 94.80, 130.79 and 70.28 is: 96.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.80 : 130.79 = 70.28 : x
  2. Step 2: Convert to fraction form
    94.80/130.79 = 70.28/x
  3. Step 3: Cross multiply
    94.80x = 130.79 × 70.28
  4. Step 4: Simplify right side
    94.80x = 9,191.92
  5. Step 5: Solve for x
    x = 9,191.92/94.80
  6. Step 6: Final answer
    x = 96.96

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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.