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Finding the Fourth Proportional to 87,394.80, 131,092.20 and 80,636.40

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Solution

The fourth proportional to 87,394.80, 131,092.20 and 80,636.40 is: 120,954.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,394.80 : 131,092.20 = 80,636.40 : x
  2. Step 2: Convert to fraction form
    87,394.80/131,092.20 = 80,636.40/x
  3. Step 3: Cross multiply
    87,394.80x = 131,092.20 × 80,636.40
  4. Step 4: Simplify right side
    87,394.80x = 10,570,803,076.08
  5. Step 5: Solve for x
    x = 10,570,803,076.08/87,394.80
  6. Step 6: Final answer
    x = 120,954.60

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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.