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Finding the Fourth Proportional to 122,790, 169,450.20 and 69,798

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Solution

The fourth proportional to 122,790, 169,450.20 and 69,798 is: 96,321.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,790 : 169,450.20 = 69,798 : x
  2. Step 2: Convert to fraction form
    122,790/169,450.20 = 69,798/x
  3. Step 3: Cross multiply
    122,790x = 169,450.20 × 69,798
  4. Step 4: Simplify right side
    122,790x = 11,827,285,059.60
  5. Step 5: Solve for x
    x = 11,827,285,059.60/122,790
  6. Step 6: Final answer
    x = 96,321.24

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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.