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Finding the Fourth Proportional to 85,614.42, 128,458.32 and 33,060.78

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Solution

The fourth proportional to 85,614.42, 128,458.32 and 33,060.78 is: 49,605.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,614.42 : 128,458.32 = 33,060.78 : x
  2. Step 2: Convert to fraction form
    85,614.42/128,458.32 = 33,060.78/x
  3. Step 3: Cross multiply
    85,614.42x = 128,458.32 × 33,060.78
  4. Step 4: Simplify right side
    85,614.42x = 4,246,932,256.69
  5. Step 5: Solve for x
    x = 4,246,932,256.69/85,614.42
  6. Step 6: Final answer
    x = 49,605.34

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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.