Home / 85,644.12-128,278.61-43,451.73

Finding the Fourth Proportional to 85,644.12, 128,278.61 and 43,451.73

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Solution

The fourth proportional to 85,644.12, 128,278.61 and 43,451.73 is: 65,082.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,644.12 : 128,278.61 = 43,451.73 : x
  2. Step 2: Convert to fraction form
    85,644.12/128,278.61 = 43,451.73/x
  3. Step 3: Cross multiply
    85,644.12x = 128,278.61 × 43,451.73
  4. Step 4: Simplify right side
    85,644.12x = 5,573,927,309.24
  5. Step 5: Solve for x
    x = 5,573,927,309.24/85,644.12
  6. Step 6: Final answer
    x = 65,082.43

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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.