Home / 85,348.20-128,022.30-54,218.60

Finding the Fourth Proportional to 85,348.20, 128,022.30 and 54,218.60

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Solution

The fourth proportional to 85,348.20, 128,022.30 and 54,218.60 is: 81,327.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,348.20 : 128,022.30 = 54,218.60 : x
  2. Step 2: Convert to fraction form
    85,348.20/128,022.30 = 54,218.60/x
  3. Step 3: Cross multiply
    85,348.20x = 128,022.30 × 54,218.60
  4. Step 4: Simplify right side
    85,348.20x = 6,941,189,874.78
  5. Step 5: Solve for x
    x = 6,941,189,874.78/85,348.20
  6. Step 6: Final answer
    x = 81,327.90

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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.