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Finding the Fourth Proportional to 178,739.97, 268,109.73 and 45,620.21

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Solution

The fourth proportional to 178,739.97, 268,109.73 and 45,620.21 is: 68,430.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,739.97 : 268,109.73 = 45,620.21 : x
  2. Step 2: Convert to fraction form
    178,739.97/268,109.73 = 45,620.21/x
  3. Step 3: Cross multiply
    178,739.97x = 268,109.73 × 45,620.21
  4. Step 4: Simplify right side
    178,739.97x = 12,231,222,855.92
  5. Step 5: Solve for x
    x = 12,231,222,855.92/178,739.97
  6. Step 6: Final answer
    x = 68,430.26

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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.