Home / 143,420.72-214,786.56-80,085.20

Finding the Fourth Proportional to 143,420.72, 214,786.56 and 80,085.20

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Solution

The fourth proportional to 143,420.72, 214,786.56 and 80,085.20 is: 119,935.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,420.72 : 214,786.56 = 80,085.20 : x
  2. Step 2: Convert to fraction form
    143,420.72/214,786.56 = 80,085.20/x
  3. Step 3: Cross multiply
    143,420.72x = 214,786.56 × 80,085.20
  4. Step 4: Simplify right side
    143,420.72x = 17,201,224,614.91
  5. Step 5: Solve for x
    x = 17,201,224,614.91/143,420.72
  6. Step 6: Final answer
    x = 119,935.42

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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.