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Finding the Fourth Proportional to 98,481.82, 135,858.45 and 71,612.50

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Solution

The fourth proportional to 98,481.82, 135,858.45 and 71,612.50 is: 98,791.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,481.82 : 135,858.45 = 71,612.50 : x
  2. Step 2: Convert to fraction form
    98,481.82/135,858.45 = 71,612.50/x
  3. Step 3: Cross multiply
    98,481.82x = 135,858.45 × 71,612.50
  4. Step 4: Simplify right side
    98,481.82x = 9,729,163,250.63
  5. Step 5: Solve for x
    x = 9,729,163,250.63/98,481.82
  6. Step 6: Final answer
    x = 98,791.46

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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.