Home / 143,351.43-197,830.05-78,825.58

Finding the Fourth Proportional to 143,351.43, 197,830.05 and 78,825.58

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Solution

The fourth proportional to 143,351.43, 197,830.05 and 78,825.58 is: 108,782.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,351.43 : 197,830.05 = 78,825.58 : x
  2. Step 2: Convert to fraction form
    143,351.43/197,830.05 = 78,825.58/x
  3. Step 3: Cross multiply
    143,351.43x = 197,830.05 × 78,825.58
  4. Step 4: Simplify right side
    143,351.43x = 15,594,067,938.10
  5. Step 5: Solve for x
    x = 15,594,067,938.10/143,351.43
  6. Step 6: Final answer
    x = 108,782.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.