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Finding the Fourth Proportional to 59,803.78, 89,707.72 and 31,685.80

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Solution

The fourth proportional to 59,803.78, 89,707.72 and 31,685.80 is: 47,529.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,803.78 : 89,707.72 = 31,685.80 : x
  2. Step 2: Convert to fraction form
    59,803.78/89,707.72 = 31,685.80/x
  3. Step 3: Cross multiply
    59,803.78x = 89,707.72 × 31,685.80
  4. Step 4: Simplify right side
    59,803.78x = 2,842,460,874.38
  5. Step 5: Solve for x
    x = 2,842,460,874.38/59,803.78
  6. Step 6: Final answer
    x = 47,529.79

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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.