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Finding the Fourth Proportional to 68,418.39, 102,626.88 and 21,671.28

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Solution

The fourth proportional to 68,418.39, 102,626.88 and 21,671.28 is: 32,506.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,418.39 : 102,626.88 = 21,671.28 : x
  2. Step 2: Convert to fraction form
    68,418.39/102,626.88 = 21,671.28/x
  3. Step 3: Cross multiply
    68,418.39x = 102,626.88 × 21,671.28
  4. Step 4: Simplify right side
    68,418.39x = 2,224,055,852.01
  5. Step 5: Solve for x
    x = 2,224,055,852.01/68,418.39
  6. Step 6: Final answer
    x = 32,506.70

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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.