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Finding the Fourth Proportional to 79,163.60, 118,745.40 and 19,999.44

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Solution

The fourth proportional to 79,163.60, 118,745.40 and 19,999.44 is: 29,999.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,163.60 : 118,745.40 = 19,999.44 : x
  2. Step 2: Convert to fraction form
    79,163.60/118,745.40 = 19,999.44/x
  3. Step 3: Cross multiply
    79,163.60x = 118,745.40 × 19,999.44
  4. Step 4: Simplify right side
    79,163.60x = 2,374,841,502.58
  5. Step 5: Solve for x
    x = 2,374,841,502.58/79,163.60
  6. Step 6: Final answer
    x = 29,999.16

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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.