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Finding the Fourth Proportional to 122,709.67, 169,270.18 and 73,638.60

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Solution

The fourth proportional to 122,709.67, 169,270.18 and 73,638.60 is: 101,579.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,709.67 : 169,270.18 = 73,638.60 : x
  2. Step 2: Convert to fraction form
    122,709.67/169,270.18 = 73,638.60/x
  3. Step 3: Cross multiply
    122,709.67x = 169,270.18 × 73,638.60
  4. Step 4: Simplify right side
    122,709.67x = 12,464,819,076.95
  5. Step 5: Solve for x
    x = 12,464,819,076.95/122,709.67
  6. Step 6: Final answer
    x = 101,579.76

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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.