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Finding the Fourth Proportional to 84.52, 126.29 and 70.12

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Solution

The fourth proportional to 84.52, 126.29 and 70.12 is: 104.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.52 : 126.29 = 70.12 : x
  2. Step 2: Convert to fraction form
    84.52/126.29 = 70.12/x
  3. Step 3: Cross multiply
    84.52x = 126.29 × 70.12
  4. Step 4: Simplify right side
    84.52x = 8,855.45
  5. Step 5: Solve for x
    x = 8,855.45/84.52
  6. Step 6: Final answer
    x = 104.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.