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Finding the Fourth Proportional to 125,511.82, 173,090.60 and 85,285.60

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Solution

The fourth proportional to 125,511.82, 173,090.60 and 85,285.60 is: 117,615.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,511.82 : 173,090.60 = 85,285.60 : x
  2. Step 2: Convert to fraction form
    125,511.82/173,090.60 = 85,285.60/x
  3. Step 3: Cross multiply
    125,511.82x = 173,090.60 × 85,285.60
  4. Step 4: Simplify right side
    125,511.82x = 14,762,135,675.36
  5. Step 5: Solve for x
    x = 14,762,135,675.36/125,511.82
  6. Step 6: Final answer
    x = 117,615.50

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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.