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Finding the Fourth Proportional to 185,487.88, 278,199.52 and 85,639.56

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Solution

The fourth proportional to 185,487.88, 278,199.52 and 85,639.56 is: 128,444.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,487.88 : 278,199.52 = 85,639.56 : x
  2. Step 2: Convert to fraction form
    185,487.88/278,199.52 = 85,639.56/x
  3. Step 3: Cross multiply
    185,487.88x = 278,199.52 × 85,639.56
  4. Step 4: Simplify right side
    185,487.88x = 23,824,884,485.01
  5. Step 5: Solve for x
    x = 23,824,884,485.01/185,487.88
  6. Step 6: Final answer
    x = 128,444.43

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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.