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Finding the Fourth Proportional to 100,679.28, 150,723.60 and 70,589.20

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Solution

The fourth proportional to 100,679.28, 150,723.60 and 70,589.20 is: 105,676.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,679.28 : 150,723.60 = 70,589.20 : x
  2. Step 2: Convert to fraction form
    100,679.28/150,723.60 = 70,589.20/x
  3. Step 3: Cross multiply
    100,679.28x = 150,723.60 × 70,589.20
  4. Step 4: Simplify right side
    100,679.28x = 10,639,458,345.12
  5. Step 5: Solve for x
    x = 10,639,458,345.12/100,679.28
  6. Step 6: Final answer
    x = 105,676.74

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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.