Home / 193,485.43-290,340.20-81,155.65

Finding the Fourth Proportional to 193,485.43, 290,340.20 and 81,155.65

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Solution

The fourth proportional to 193,485.43, 290,340.20 and 81,155.65 is: 121,780.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,485.43 : 290,340.20 = 81,155.65 : x
  2. Step 2: Convert to fraction form
    193,485.43/290,340.20 = 81,155.65/x
  3. Step 3: Cross multiply
    193,485.43x = 290,340.20 × 81,155.65
  4. Step 4: Simplify right side
    193,485.43x = 23,562,747,246.35
  5. Step 5: Solve for x
    x = 23,562,747,246.35/193,485.43
  6. Step 6: Final answer
    x = 121,780.47

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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.