Home / 72,515.38-108,631.72-40,828.59

Finding the Fourth Proportional to 72,515.38, 108,631.72 and 40,828.59

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Solution

The fourth proportional to 72,515.38, 108,631.72 and 40,828.59 is: 61,163.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,515.38 : 108,631.72 = 40,828.59 : x
  2. Step 2: Convert to fraction form
    72,515.38/108,631.72 = 40,828.59/x
  3. Step 3: Cross multiply
    72,515.38x = 108,631.72 × 40,828.59
  4. Step 4: Simplify right side
    72,515.38x = 4,435,279,956.87
  5. Step 5: Solve for x
    x = 4,435,279,956.87/72,515.38
  6. Step 6: Final answer
    x = 61,163.30

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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.