Home / 79,439.10-119,158.56-20,274.78

Finding the Fourth Proportional to 79,439.10, 119,158.56 and 20,274.78

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Solution

The fourth proportional to 79,439.10, 119,158.56 and 20,274.78 is: 30,412.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,439.10 : 119,158.56 = 20,274.78 : x
  2. Step 2: Convert to fraction form
    79,439.10/119,158.56 = 20,274.78/x
  3. Step 3: Cross multiply
    79,439.10x = 119,158.56 × 20,274.78
  4. Step 4: Simplify right side
    79,439.10x = 2,415,913,589.12
  5. Step 5: Solve for x
    x = 2,415,913,589.12/79,439.10
  6. Step 6: Final answer
    x = 30,412.15

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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.