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Finding the Fourth Proportional to 118,422, 163,422.36 and 68,121

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Solution

The fourth proportional to 118,422, 163,422.36 and 68,121 is: 94,006.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,422 : 163,422.36 = 68,121 : x
  2. Step 2: Convert to fraction form
    118,422/163,422.36 = 68,121/x
  3. Step 3: Cross multiply
    118,422x = 163,422.36 × 68,121
  4. Step 4: Simplify right side
    118,422x = 11,132,494,585.56
  5. Step 5: Solve for x
    x = 11,132,494,585.56/118,422
  6. Step 6: Final answer
    x = 94,006.98

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.