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Finding the Fourth Proportional to 94.40, 130.28 and 71.08

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Solution

The fourth proportional to 94.40, 130.28 and 71.08 is: 98.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.40 : 130.28 = 71.08 : x
  2. Step 2: Convert to fraction form
    94.40/130.28 = 71.08/x
  3. Step 3: Cross multiply
    94.40x = 130.28 × 71.08
  4. Step 4: Simplify right side
    94.40x = 9,260.30
  5. Step 5: Solve for x
    x = 9,260.30/94.40
  6. Step 6: Final answer
    x = 98.10

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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.