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Finding the Fourth Proportional to 122,487.94, 169,028.98 and 68,775.22

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Solution

The fourth proportional to 122,487.94, 169,028.98 and 68,775.22 is: 94,907.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,487.94 : 169,028.98 = 68,775.22 : x
  2. Step 2: Convert to fraction form
    122,487.94/169,028.98 = 68,775.22/x
  3. Step 3: Cross multiply
    122,487.94x = 169,028.98 × 68,775.22
  4. Step 4: Simplify right side
    122,487.94x = 11,625,004,942.00
  5. Step 5: Solve for x
    x = 11,625,004,942.00/122,487.94
  6. Step 6: Final answer
    x = 94,907.34

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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.