Home / 85,612.87-128,441.21-50,104.09

Finding the Fourth Proportional to 85,612.87, 128,441.21 and 50,104.09

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Solution

The fourth proportional to 85,612.87, 128,441.21 and 50,104.09 is: 75,168.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,612.87 : 128,441.21 = 50,104.09 : x
  2. Step 2: Convert to fraction form
    85,612.87/128,441.21 = 50,104.09/x
  3. Step 3: Cross multiply
    85,612.87x = 128,441.21 × 50,104.09
  4. Step 4: Simplify right side
    85,612.87x = 6,435,430,070.81
  5. Step 5: Solve for x
    x = 6,435,430,070.81/85,612.87
  6. Step 6: Final answer
    x = 75,168.96

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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.