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Finding the Fourth Proportional to 143,418.80, 215,128.20 and 109,593.20

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Solution

The fourth proportional to 143,418.80, 215,128.20 and 109,593.20 is: 164,389.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,418.80 : 215,128.20 = 109,593.20 : x
  2. Step 2: Convert to fraction form
    143,418.80/215,128.20 = 109,593.20/x
  3. Step 3: Cross multiply
    143,418.80x = 215,128.20 × 109,593.20
  4. Step 4: Simplify right side
    143,418.80x = 23,576,587,848.24
  5. Step 5: Solve for x
    x = 23,576,587,848.24/143,418.80
  6. Step 6: Final answer
    x = 164,389.80

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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.