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Finding the Fourth Proportional to 86,181.70, 129,276.60 and 27,019.30

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Solution

The fourth proportional to 86,181.70, 129,276.60 and 27,019.30 is: 40,530.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,181.70 : 129,276.60 = 27,019.30 : x
  2. Step 2: Convert to fraction form
    86,181.70/129,276.60 = 27,019.30/x
  3. Step 3: Cross multiply
    86,181.70x = 129,276.60 × 27,019.30
  4. Step 4: Simplify right side
    86,181.70x = 3,492,963,238.38
  5. Step 5: Solve for x
    x = 3,492,963,238.38/86,181.70
  6. Step 6: Final answer
    x = 40,530.22

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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.