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Finding the Fourth Proportional to 86,581.80, 129,921.30 and 36,653.40

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Solution

The fourth proportional to 86,581.80, 129,921.30 and 36,653.40 is: 55,000.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,581.80 : 129,921.30 = 36,653.40 : x
  2. Step 2: Convert to fraction form
    86,581.80/129,921.30 = 36,653.40/x
  3. Step 3: Cross multiply
    86,581.80x = 129,921.30 × 36,653.40
  4. Step 4: Simplify right side
    86,581.80x = 4,762,057,377.42
  5. Step 5: Solve for x
    x = 4,762,057,377.42/86,581.80
  6. Step 6: Final answer
    x = 55,000.67

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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.