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Finding the Fourth Proportional to 143,858.90, 215,819.48 and 55,112.40

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Solution

The fourth proportional to 143,858.90, 215,819.48 and 55,112.40 is: 82,680.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,858.90 : 215,819.48 = 55,112.40 : x
  2. Step 2: Convert to fraction form
    143,858.90/215,819.48 = 55,112.40/x
  3. Step 3: Cross multiply
    143,858.90x = 215,819.48 × 55,112.40
  4. Step 4: Simplify right side
    143,858.90x = 11,894,329,509.55
  5. Step 5: Solve for x
    x = 11,894,329,509.55/143,858.90
  6. Step 6: Final answer
    x = 82,680.53

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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.