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Finding the Fourth Proportional to 122,439.30, 168,954.57 and 68,712

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Solution

The fourth proportional to 122,439.30, 168,954.57 and 68,712 is: 94,816.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,439.30 : 168,954.57 = 68,712 : x
  2. Step 2: Convert to fraction form
    122,439.30/168,954.57 = 68,712/x
  3. Step 3: Cross multiply
    122,439.30x = 168,954.57 × 68,712
  4. Step 4: Simplify right side
    122,439.30x = 11,609,206,413.84
  5. Step 5: Solve for x
    x = 11,609,206,413.84/122,439.30
  6. Step 6: Final answer
    x = 94,816.01

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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.