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Finding the Fourth Proportional to 85,616.78, 128,447.03 and 33,012.14

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Solution

The fourth proportional to 85,616.78, 128,447.03 and 33,012.14 is: 49,526.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,616.78 : 128,447.03 = 33,012.14 : x
  2. Step 2: Convert to fraction form
    85,616.78/128,447.03 = 33,012.14/x
  3. Step 3: Cross multiply
    85,616.78x = 128,447.03 × 33,012.14
  4. Step 4: Simplify right side
    85,616.78x = 4,240,310,777.24
  5. Step 5: Solve for x
    x = 4,240,310,777.24/85,616.78
  6. Step 6: Final answer
    x = 49,526.64

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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.