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Finding the Fourth Proportional to 201,815.80, 303,379.80 and 143,058.40

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Solution

The fourth proportional to 201,815.80, 303,379.80 and 143,058.40 is: 215,052.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,815.80 : 303,379.80 = 143,058.40 : x
  2. Step 2: Convert to fraction form
    201,815.80/303,379.80 = 143,058.40/x
  3. Step 3: Cross multiply
    201,815.80x = 303,379.80 × 143,058.40
  4. Step 4: Simplify right side
    201,815.80x = 43,401,028,780.32
  5. Step 5: Solve for x
    x = 43,401,028,780.32/201,815.80
  6. Step 6: Final answer
    x = 215,052.68

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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.