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Finding the Fourth Proportional to 80,143.60, 120,215.40 and 33,390.40

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Solution

The fourth proportional to 80,143.60, 120,215.40 and 33,390.40 is: 50,085.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,143.60 : 120,215.40 = 33,390.40 : x
  2. Step 2: Convert to fraction form
    80,143.60/120,215.40 = 33,390.40/x
  3. Step 3: Cross multiply
    80,143.60x = 120,215.40 × 33,390.40
  4. Step 4: Simplify right side
    80,143.60x = 4,014,040,292.16
  5. Step 5: Solve for x
    x = 4,014,040,292.16/80,143.60
  6. Step 6: Final answer
    x = 50,085.60

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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.