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Finding the Fourth Proportional to 80,122.40, 120,025.20 and 70,272.80

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Solution

The fourth proportional to 80,122.40, 120,025.20 and 70,272.80 is: 105,270.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,122.40 : 120,025.20 = 70,272.80 : x
  2. Step 2: Convert to fraction form
    80,122.40/120,025.20 = 70,272.80/x
  3. Step 3: Cross multiply
    80,122.40x = 120,025.20 × 70,272.80
  4. Step 4: Simplify right side
    80,122.40x = 8,434,506,874.56
  5. Step 5: Solve for x
    x = 8,434,506,874.56/80,122.40
  6. Step 6: Final answer
    x = 105,270.27

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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.