Home / 85,785.30-128,764.35-41,447.70

Finding the Fourth Proportional to 85,785.30, 128,764.35 and 41,447.70

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Solution

The fourth proportional to 85,785.30, 128,764.35 and 41,447.70 is: 62,213.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,785.30 : 128,764.35 = 41,447.70 : x
  2. Step 2: Convert to fraction form
    85,785.30/128,764.35 = 41,447.70/x
  3. Step 3: Cross multiply
    85,785.30x = 128,764.35 × 41,447.70
  4. Step 4: Simplify right side
    85,785.30x = 5,336,986,149.50
  5. Step 5: Solve for x
    x = 5,336,986,149.50/85,785.30
  6. Step 6: Final answer
    x = 62,213.29

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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.