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Finding the Fourth Proportional to 85,859.08, 128,745.39 and 50,328.87

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Solution

The fourth proportional to 85,859.08, 128,745.39 and 50,328.87 is: 75,467.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,859.08 : 128,745.39 = 50,328.87 : x
  2. Step 2: Convert to fraction form
    85,859.08/128,745.39 = 50,328.87/x
  3. Step 3: Cross multiply
    85,859.08x = 128,745.39 × 50,328.87
  4. Step 4: Simplify right side
    85,859.08x = 6,479,609,710.57
  5. Step 5: Solve for x
    x = 6,479,609,710.57/85,859.08
  6. Step 6: Final answer
    x = 75,467.96

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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.