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Finding the Fourth Proportional to 86,486.96, 129,788.76 and 33,889.88

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Solution

The fourth proportional to 86,486.96, 129,788.76 and 33,889.88 is: 50,857.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,486.96 : 129,788.76 = 33,889.88 : x
  2. Step 2: Convert to fraction form
    86,486.96/129,788.76 = 33,889.88/x
  3. Step 3: Cross multiply
    86,486.96x = 129,788.76 × 33,889.88
  4. Step 4: Simplify right side
    86,486.96x = 4,398,525,501.75
  5. Step 5: Solve for x
    x = 4,398,525,501.75/86,486.96
  6. Step 6: Final answer
    x = 50,857.67

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1.5x scale

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.