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Finding the Fourth Proportional to 85,950, 128,928.24 and 26,785.44

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Solution

The fourth proportional to 85,950, 128,928.24 and 26,785.44 is: 40,179.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,950 : 128,928.24 = 26,785.44 : x
  2. Step 2: Convert to fraction form
    85,950/128,928.24 = 26,785.44/x
  3. Step 3: Cross multiply
    85,950x = 128,928.24 × 26,785.44
  4. Step 4: Simplify right side
    85,950x = 3,453,399,636.83
  5. Step 5: Solve for x
    x = 3,453,399,636.83/85,950
  6. Step 6: Final answer
    x = 40,179.17

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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.