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Finding the Fourth Proportional to 85,940.58, 118,655.82 and 65,761.44

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Solution

The fourth proportional to 85,940.58, 118,655.82 and 65,761.44 is: 90,795.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,940.58 : 118,655.82 = 65,761.44 : x
  2. Step 2: Convert to fraction form
    85,940.58/118,655.82 = 65,761.44/x
  3. Step 3: Cross multiply
    85,940.58x = 118,655.82 × 65,761.44
  4. Step 4: Simplify right side
    85,940.58x = 7,802,977,587.58
  5. Step 5: Solve for x
    x = 7,802,977,587.58/85,940.58
  6. Step 6: Final answer
    x = 90,795.03

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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.