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Finding the Fourth Proportional to 56,561.80, 84,842.70 and 47,345.80

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Solution

The fourth proportional to 56,561.80, 84,842.70 and 47,345.80 is: 71,018.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,561.80 : 84,842.70 = 47,345.80 : x
  2. Step 2: Convert to fraction form
    56,561.80/84,842.70 = 47,345.80/x
  3. Step 3: Cross multiply
    56,561.80x = 84,842.70 × 47,345.80
  4. Step 4: Simplify right side
    56,561.80x = 4,016,945,505.66
  5. Step 5: Solve for x
    x = 4,016,945,505.66/56,561.80
  6. Step 6: Final answer
    x = 71,018.70

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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.