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Finding the Fourth Proportional to 85,489.64, 128,240.40 and 32,899.04

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Solution

The fourth proportional to 85,489.64, 128,240.40 and 32,899.04 is: 49,350.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,489.64 : 128,240.40 = 32,899.04 : x
  2. Step 2: Convert to fraction form
    85,489.64/128,240.40 = 32,899.04/x
  3. Step 3: Cross multiply
    85,489.64x = 128,240.40 × 32,899.04
  4. Step 4: Simplify right side
    85,489.64x = 4,218,986,049.22
  5. Step 5: Solve for x
    x = 4,218,986,049.22/85,489.64
  6. Step 6: Final answer
    x = 49,350.85

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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.