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Finding the Fourth Proportional to 85,893.57, 128,812.12 and 28,952.19

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Solution

The fourth proportional to 85,893.57, 128,812.12 and 28,952.19 is: 43,418.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,893.57 : 128,812.12 = 28,952.19 : x
  2. Step 2: Convert to fraction form
    85,893.57/128,812.12 = 28,952.19/x
  3. Step 3: Cross multiply
    85,893.57x = 128,812.12 × 28,952.19
  4. Step 4: Simplify right side
    85,893.57x = 3,729,392,900.16
  5. Step 5: Solve for x
    x = 3,729,392,900.16/85,893.57
  6. Step 6: Final answer
    x = 43,418.77

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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.