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Finding the Fourth Proportional to 259,876.73, 389,840.63 and 108,042.45

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Solution

The fourth proportional to 259,876.73, 389,840.63 and 108,042.45 is: 162,074.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,876.73 : 389,840.63 = 108,042.45 : x
  2. Step 2: Convert to fraction form
    259,876.73/389,840.63 = 108,042.45/x
  3. Step 3: Cross multiply
    259,876.73x = 389,840.63 × 108,042.45
  4. Step 4: Simplify right side
    259,876.73x = 42,119,336,774.74
  5. Step 5: Solve for x
    x = 42,119,336,774.74/259,876.73
  6. Step 6: Final answer
    x = 162,074.29

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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.