Home / 79,639.38-109,899.72-47,789.46

Finding the Fourth Proportional to 79,639.38, 109,899.72 and 47,789.46

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Solution

The fourth proportional to 79,639.38, 109,899.72 and 47,789.46 is: 65,947.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,639.38 : 109,899.72 = 47,789.46 : x
  2. Step 2: Convert to fraction form
    79,639.38/109,899.72 = 47,789.46/x
  3. Step 3: Cross multiply
    79,639.38x = 109,899.72 × 47,789.46
  4. Step 4: Simplify right side
    79,639.38x = 5,252,048,272.95
  5. Step 5: Solve for x
    x = 5,252,048,272.95/79,639.38
  6. Step 6: Final answer
    x = 65,947.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.