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Finding the Fourth Proportional to 64,866.51, 89,515.90 and 36,188.05

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Solution

The fourth proportional to 64,866.51, 89,515.90 and 36,188.05 is: 49,939.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,866.51 : 89,515.90 = 36,188.05 : x
  2. Step 2: Convert to fraction form
    64,866.51/89,515.90 = 36,188.05/x
  3. Step 3: Cross multiply
    64,866.51x = 89,515.90 × 36,188.05
  4. Step 4: Simplify right side
    64,866.51x = 3,239,405,865.00
  5. Step 5: Solve for x
    x = 3,239,405,865.00/64,866.51
  6. Step 6: Final answer
    x = 49,939.57

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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.