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Finding the Fourth Proportional to 58,723.60, 87,939.60 and 47,059.60

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Solution

The fourth proportional to 58,723.60, 87,939.60 and 47,059.60 is: 70,472.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,723.60 : 87,939.60 = 47,059.60 : x
  2. Step 2: Convert to fraction form
    58,723.60/87,939.60 = 47,059.60/x
  3. Step 3: Cross multiply
    58,723.60x = 87,939.60 × 47,059.60
  4. Step 4: Simplify right side
    58,723.60x = 4,138,402,400.16
  5. Step 5: Solve for x
    x = 4,138,402,400.16/58,723.60
  6. Step 6: Final answer
    x = 70,472.56

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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.