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Finding the Fourth Proportional to 122,648.40, 169,250.36 and 68,936.36

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Solution

The fourth proportional to 122,648.40, 169,250.36 and 68,936.36 is: 95,129.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,648.40 : 169,250.36 = 68,936.36 : x
  2. Step 2: Convert to fraction form
    122,648.40/169,250.36 = 68,936.36/x
  3. Step 3: Cross multiply
    122,648.40x = 169,250.36 × 68,936.36
  4. Step 4: Simplify right side
    122,648.40x = 11,667,502,556.16
  5. Step 5: Solve for x
    x = 11,667,502,556.16/122,648.40
  6. Step 6: Final answer
    x = 95,129.68

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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.