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Finding the Fourth Proportional to 84,776.40, 126,945.90 and 67,280.40

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Solution

The fourth proportional to 84,776.40, 126,945.90 and 67,280.40 is: 100,747.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,776.40 : 126,945.90 = 67,280.40 : x
  2. Step 2: Convert to fraction form
    84,776.40/126,945.90 = 67,280.40/x
  3. Step 3: Cross multiply
    84,776.40x = 126,945.90 × 67,280.40
  4. Step 4: Simplify right side
    84,776.40x = 8,540,970,930.36
  5. Step 5: Solve for x
    x = 8,540,970,930.36/84,776.40
  6. Step 6: Final answer
    x = 100,747.03

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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.