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Finding the Fourth Proportional to 86,399.76, 119,237.16 and 65,141.52

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Solution

The fourth proportional to 86,399.76, 119,237.16 and 65,141.52 is: 89,899.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,399.76 : 119,237.16 = 65,141.52 : x
  2. Step 2: Convert to fraction form
    86,399.76/119,237.16 = 65,141.52/x
  3. Step 3: Cross multiply
    86,399.76x = 119,237.16 × 65,141.52
  4. Step 4: Simplify right side
    86,399.76x = 7,767,289,842.88
  5. Step 5: Solve for x
    x = 7,767,289,842.88/86,399.76
  6. Step 6: Final answer
    x = 89,899.44

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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.