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Finding the Fourth Proportional to 58,081.70, 87,129.03 and 18,624.98

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Solution

The fourth proportional to 58,081.70, 87,129.03 and 18,624.98 is: 27,939.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,081.70 : 87,129.03 = 18,624.98 : x
  2. Step 2: Convert to fraction form
    58,081.70/87,129.03 = 18,624.98/x
  3. Step 3: Cross multiply
    58,081.70x = 87,129.03 × 18,624.98
  4. Step 4: Simplify right side
    58,081.70x = 1,622,776,441.17
  5. Step 5: Solve for x
    x = 1,622,776,441.17/58,081.70
  6. Step 6: Final answer
    x = 27,939.55

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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.