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Finding the Fourth Proportional to 84,426, 126,639.12 and 29,022

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Solution

The fourth proportional to 84,426, 126,639.12 and 29,022 is: 43,533.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,426 : 126,639.12 = 29,022 : x
  2. Step 2: Convert to fraction form
    84,426/126,639.12 = 29,022/x
  3. Step 3: Cross multiply
    84,426x = 126,639.12 × 29,022
  4. Step 4: Simplify right side
    84,426x = 3,675,320,540.64
  5. Step 5: Solve for x
    x = 3,675,320,540.64/84,426
  6. Step 6: Final answer
    x = 43,533.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.