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Finding the Fourth Proportional to 115,812.56, 159,819.80 and 65,511.56

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Solution

The fourth proportional to 115,812.56, 159,819.80 and 65,511.56 is: 90,405.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,812.56 : 159,819.80 = 65,511.56 : x
  2. Step 2: Convert to fraction form
    115,812.56/159,819.80 = 65,511.56/x
  3. Step 3: Cross multiply
    115,812.56x = 159,819.80 × 65,511.56
  4. Step 4: Simplify right side
    115,812.56x = 10,470,044,416.89
  5. Step 5: Solve for x
    x = 10,470,044,416.89/115,812.56
  6. Step 6: Final answer
    x = 90,405.09

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1.5x scale

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.