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Finding the Fourth Proportional to 86,178.71, 129,268.11 and 27,019.00

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Solution

The fourth proportional to 86,178.71, 129,268.11 and 27,019.00 is: 40,528.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,178.71 : 129,268.11 = 27,019.00 : x
  2. Step 2: Convert to fraction form
    86,178.71/129,268.11 = 27,019.00/x
  3. Step 3: Cross multiply
    86,178.71x = 129,268.11 × 27,019.00
  4. Step 4: Simplify right side
    86,178.71x = 3,492,694,282.65
  5. Step 5: Solve for x
    x = 3,492,694,282.65/86,178.71
  6. Step 6: Final answer
    x = 40,528.51

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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.