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Finding the Fourth Proportional to 86,291.65, 129,384.62 and 33,639.63

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Solution

The fourth proportional to 86,291.65, 129,384.62 and 33,639.63 is: 50,438.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,291.65 : 129,384.62 = 33,639.63 : x
  2. Step 2: Convert to fraction form
    86,291.65/129,384.62 = 33,639.63/x
  3. Step 3: Cross multiply
    86,291.65x = 129,384.62 × 33,639.63
  4. Step 4: Simplify right side
    86,291.65x = 4,352,450,744.49
  5. Step 5: Solve for x
    x = 4,352,450,744.49/86,291.65
  6. Step 6: Final answer
    x = 50,438.84

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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.