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Finding the Fourth Proportional to 159,991.82, 220,789.47 and 87,395.72

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Solution

The fourth proportional to 159,991.82, 220,789.47 and 87,395.72 is: 120,606.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,991.82 : 220,789.47 = 87,395.72 : x
  2. Step 2: Convert to fraction form
    159,991.82/220,789.47 = 87,395.72/x
  3. Step 3: Cross multiply
    159,991.82x = 220,789.47 × 87,395.72
  4. Step 4: Simplify right side
    159,991.82x = 19,296,054,889.89
  5. Step 5: Solve for x
    x = 19,296,054,889.89/159,991.82
  6. Step 6: Final answer
    x = 120,606.51

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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.