Home / 213,784.38-320,731.89-80,665.77

Finding the Fourth Proportional to 213,784.38, 320,731.89 and 80,665.77

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Solution

The fourth proportional to 213,784.38, 320,731.89 and 80,665.77 is: 121,019.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,784.38 : 320,731.89 = 80,665.77 : x
  2. Step 2: Convert to fraction form
    213,784.38/320,731.89 = 80,665.77/x
  3. Step 3: Cross multiply
    213,784.38x = 320,731.89 × 80,665.77
  4. Step 4: Simplify right side
    213,784.38x = 25,872,084,870.41
  5. Step 5: Solve for x
    x = 25,872,084,870.41/213,784.38
  6. Step 6: Final answer
    x = 121,019.53

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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.