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Finding the Fourth Proportional to 100,340.64, 150,508.80 and 30,218.40

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Solution

The fourth proportional to 100,340.64, 150,508.80 and 30,218.40 is: 45,326.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,340.64 : 150,508.80 = 30,218.40 : x
  2. Step 2: Convert to fraction form
    100,340.64/150,508.80 = 30,218.40/x
  3. Step 3: Cross multiply
    100,340.64x = 150,508.80 × 30,218.40
  4. Step 4: Simplify right side
    100,340.64x = 4,548,135,121.92
  5. Step 5: Solve for x
    x = 4,548,135,121.92/100,340.64
  6. Step 6: Final answer
    x = 45,326.95

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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.