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Finding the Fourth Proportional to 86,978,239.56, 130,468,145.13 and 26,393,965.56

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Solution

The fourth proportional to 86,978,239.56, 130,468,145.13 and 26,393,965.56 is: 39,591,186.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,978,239.56 : 130,468,145.13 = 26,393,965.56 : x
  2. Step 2: Convert to fraction form
    86,978,239.56/130,468,145.13 = 26,393,965.56/x
  3. Step 3: Cross multiply
    86,978,239.56x = 130,468,145.13 × 26,393,965.56
  4. Step 4: Simplify right side
    86,978,239.56x = 3,443,571,729,238,301.50
  5. Step 5: Solve for x
    x = 3,443,571,729,238,301.50/86,978,239.56
  6. Step 6: Final answer
    x = 39,591,186.79

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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.