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Finding the Fourth Proportional to 159,590.72, 220,234.20 and 86,993.60

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Solution

The fourth proportional to 159,590.72, 220,234.20 and 86,993.60 is: 120,050.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,590.72 : 220,234.20 = 86,993.60 : x
  2. Step 2: Convert to fraction form
    159,590.72/220,234.20 = 86,993.60/x
  3. Step 3: Cross multiply
    159,590.72x = 220,234.20 × 86,993.60
  4. Step 4: Simplify right side
    159,590.72x = 19,158,965,901.12
  5. Step 5: Solve for x
    x = 19,158,965,901.12/159,590.72
  6. Step 6: Final answer
    x = 120,050.63

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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.