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Finding the Fourth Proportional to 122,139.48, 183,207.78 and 68,835.48

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Solution

The fourth proportional to 122,139.48, 183,207.78 and 68,835.48 is: 103,252.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,139.48 : 183,207.78 = 68,835.48 : x
  2. Step 2: Convert to fraction form
    122,139.48/183,207.78 = 68,835.48/x
  3. Step 3: Cross multiply
    122,139.48x = 183,207.78 × 68,835.48
  4. Step 4: Simplify right side
    122,139.48x = 12,611,195,476.03
  5. Step 5: Solve for x
    x = 12,611,195,476.03/122,139.48
  6. Step 6: Final answer
    x = 103,252.41

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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.