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Finding the Fourth Proportional to 94.40, 129.89 and 92.01

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Solution

The fourth proportional to 94.40, 129.89 and 92.01 is: 126.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.40 : 129.89 = 92.01 : x
  2. Step 2: Convert to fraction form
    94.40/129.89 = 92.01/x
  3. Step 3: Cross multiply
    94.40x = 129.89 × 92.01
  4. Step 4: Simplify right side
    94.40x = 11,950.72
  5. Step 5: Solve for x
    x = 11,950.72/94.40
  6. Step 6: Final answer
    x = 126.60

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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.