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Finding the Fourth Proportional to 143,613.60, 215,420.40 and 54,821.40

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Solution

The fourth proportional to 143,613.60, 215,420.40 and 54,821.40 is: 82,232.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,613.60 : 215,420.40 = 54,821.40 : x
  2. Step 2: Convert to fraction form
    143,613.60/215,420.40 = 54,821.40/x
  3. Step 3: Cross multiply
    143,613.60x = 215,420.40 × 54,821.40
  4. Step 4: Simplify right side
    143,613.60x = 11,809,647,916.56
  5. Step 5: Solve for x
    x = 11,809,647,916.56/143,613.60
  6. Step 6: Final answer
    x = 82,232.10

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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.