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Finding the Fourth Proportional to 108,139.39, 161,991.60 and 53,940.67

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Solution

The fourth proportional to 108,139.39, 161,991.60 and 53,940.67 is: 80,802.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,139.39 : 161,991.60 = 53,940.67 : x
  2. Step 2: Convert to fraction form
    108,139.39/161,991.60 = 53,940.67/x
  3. Step 3: Cross multiply
    108,139.39x = 161,991.60 × 53,940.67
  4. Step 4: Simplify right side
    108,139.39x = 8,737,935,438.37
  5. Step 5: Solve for x
    x = 8,737,935,438.37/108,139.39
  6. Step 6: Final answer
    x = 80,802.52

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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.