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Finding the Fourth Proportional to 86,159.78, 129,239.72 and 27,000.08

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Solution

The fourth proportional to 86,159.78, 129,239.72 and 27,000.08 is: 40,500.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,159.78 : 129,239.72 = 27,000.08 : x
  2. Step 2: Convert to fraction form
    86,159.78/129,239.72 = 27,000.08/x
  3. Step 3: Cross multiply
    86,159.78x = 129,239.72 × 27,000.08
  4. Step 4: Simplify right side
    86,159.78x = 3,489,481,997.98
  5. Step 5: Solve for x
    x = 3,489,481,997.98/86,159.78
  6. Step 6: Final answer
    x = 40,500.13

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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.