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Finding the Fourth Proportional to 300,121.20, 450,232.20 and 89,780.40

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Solution

The fourth proportional to 300,121.20, 450,232.20 and 89,780.40 is: 134,685.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,121.20 : 450,232.20 = 89,780.40 : x
  2. Step 2: Convert to fraction form
    300,121.20/450,232.20 = 89,780.40/x
  3. Step 3: Cross multiply
    300,121.20x = 450,232.20 × 89,780.40
  4. Step 4: Simplify right side
    300,121.20x = 40,422,027,008.88
  5. Step 5: Solve for x
    x = 40,422,027,008.88/300,121.20
  6. Step 6: Final answer
    x = 134,685.68

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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.