Home / 85,439.08-128,204.58-35,553.61

Finding the Fourth Proportional to 85,439.08, 128,204.58 and 35,553.61

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Solution

The fourth proportional to 85,439.08, 128,204.58 and 35,553.61 is: 53,349.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,439.08 : 128,204.58 = 35,553.61 : x
  2. Step 2: Convert to fraction form
    85,439.08/128,204.58 = 35,553.61/x
  3. Step 3: Cross multiply
    85,439.08x = 128,204.58 × 35,553.61
  4. Step 4: Simplify right side
    85,439.08x = 4,558,135,637.53
  5. Step 5: Solve for x
    x = 4,558,135,637.53/85,439.08
  6. Step 6: Final answer
    x = 53,349.54

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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.