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Finding the Fourth Proportional to 122,084.64, 168,480 and 68,369.40

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Solution

The fourth proportional to 122,084.64, 168,480 and 68,369.40 is: 94,351.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,084.64 : 168,480 = 68,369.40 : x
  2. Step 2: Convert to fraction form
    122,084.64/168,480 = 68,369.40/x
  3. Step 3: Cross multiply
    122,084.64x = 168,480 × 68,369.40
  4. Step 4: Simplify right side
    122,084.64x = 11,518,876,512.00
  5. Step 5: Solve for x
    x = 11,518,876,512.00/122,084.64
  6. Step 6: Final answer
    x = 94,351.56

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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.