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Finding the Fourth Proportional to 159,678.20, 220,345.88 and 91,647.32

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Solution

The fourth proportional to 159,678.20, 220,345.88 and 91,647.32 is: 126,467.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,678.20 : 220,345.88 = 91,647.32 : x
  2. Step 2: Convert to fraction form
    159,678.20/220,345.88 = 91,647.32/x
  3. Step 3: Cross multiply
    159,678.20x = 220,345.88 × 91,647.32
  4. Step 4: Simplify right side
    159,678.20x = 20,194,107,815.08
  5. Step 5: Solve for x
    x = 20,194,107,815.08/159,678.20
  6. Step 6: Final answer
    x = 126,467.53

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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.