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Finding the Fourth Proportional to 303,078.26, 454,518.90 and 143,129.42

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Solution

The fourth proportional to 303,078.26, 454,518.90 and 143,129.42 is: 214,647.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,078.26 : 454,518.90 = 143,129.42 : x
  2. Step 2: Convert to fraction form
    303,078.26/454,518.90 = 143,129.42/x
  3. Step 3: Cross multiply
    303,078.26x = 454,518.90 × 143,129.42
  4. Step 4: Simplify right side
    303,078.26x = 65,055,026,536.04
  5. Step 5: Solve for x
    x = 65,055,026,536.04/303,078.26
  6. Step 6: Final answer
    x = 214,647.62

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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.