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Finding the Fourth Proportional to 158,467.72, 218,687.13 and 86,846.17

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Solution

The fourth proportional to 158,467.72, 218,687.13 and 86,846.17 is: 119,848.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,467.72 : 218,687.13 = 86,846.17 : x
  2. Step 2: Convert to fraction form
    158,467.72/218,687.13 = 86,846.17/x
  3. Step 3: Cross multiply
    158,467.72x = 218,687.13 × 86,846.17
  4. Step 4: Simplify right side
    158,467.72x = 18,992,139,668.79
  5. Step 5: Solve for x
    x = 18,992,139,668.79/158,467.72
  6. Step 6: Final answer
    x = 119,848.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.