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Finding the Fourth Proportional to 58,487.28, 80,713.11 and 31,630.32

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Solution

The fourth proportional to 58,487.28, 80,713.11 and 31,630.32 is: 43,650.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,487.28 : 80,713.11 = 31,630.32 : x
  2. Step 2: Convert to fraction form
    58,487.28/80,713.11 = 31,630.32/x
  3. Step 3: Cross multiply
    58,487.28x = 80,713.11 × 31,630.32
  4. Step 4: Simplify right side
    58,487.28x = 2,552,981,497.50
  5. Step 5: Solve for x
    x = 2,552,981,497.50/58,487.28
  6. Step 6: Final answer
    x = 43,650.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.