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Finding the Fourth Proportional to 84,205.80, 126,308.70 and 83,622.60

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Solution

The fourth proportional to 84,205.80, 126,308.70 and 83,622.60 is: 125,433.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,205.80 : 126,308.70 = 83,622.60 : x
  2. Step 2: Convert to fraction form
    84,205.80/126,308.70 = 83,622.60/x
  3. Step 3: Cross multiply
    84,205.80x = 126,308.70 × 83,622.60
  4. Step 4: Simplify right side
    84,205.80x = 10,562,261,896.62
  5. Step 5: Solve for x
    x = 10,562,261,896.62/84,205.80
  6. Step 6: Final answer
    x = 125,433.90

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1.5x scale

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.