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Finding the Fourth Proportional to 143,763.45, 215,543.11 and 54,942.09

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Solution

The fourth proportional to 143,763.45, 215,543.11 and 54,942.09 is: 82,374.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,763.45 : 215,543.11 = 54,942.09 : x
  2. Step 2: Convert to fraction form
    143,763.45/215,543.11 = 54,942.09/x
  3. Step 3: Cross multiply
    143,763.45x = 215,543.11 × 54,942.09
  4. Step 4: Simplify right side
    143,763.45x = 11,842,388,948.50
  5. Step 5: Solve for x
    x = 11,842,388,948.50/143,763.45
  6. Step 6: Final answer
    x = 82,374.13

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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.