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Finding the Fourth Proportional to 122,469.72, 183,772.62 and 66,309

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Solution

The fourth proportional to 122,469.72, 183,772.62 and 66,309 is: 99,500.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,469.72 : 183,772.62 = 66,309 : x
  2. Step 2: Convert to fraction form
    122,469.72/183,772.62 = 66,309/x
  3. Step 3: Cross multiply
    122,469.72x = 183,772.62 × 66,309
  4. Step 4: Simplify right side
    122,469.72x = 12,185,778,659.58
  5. Step 5: Solve for x
    x = 12,185,778,659.58/122,469.72
  6. Step 6: Final answer
    x = 99,500.34

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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.