Home / 85,471.85-128,236.26-53,845.40

Finding the Fourth Proportional to 85,471.85, 128,236.26 and 53,845.40

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Solution

The fourth proportional to 85,471.85, 128,236.26 and 53,845.40 is: 80,786.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,471.85 : 128,236.26 = 53,845.40 : x
  2. Step 2: Convert to fraction form
    85,471.85/128,236.26 = 53,845.40/x
  3. Step 3: Cross multiply
    85,471.85x = 128,236.26 × 53,845.40
  4. Step 4: Simplify right side
    85,471.85x = 6,904,932,714.20
  5. Step 5: Solve for x
    x = 6,904,932,714.20/85,471.85
  6. Step 6: Final answer
    x = 80,786.04

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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.