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Finding the Fourth Proportional to 268,321.39, 402,495.86 and 68,643.50

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Solution

The fourth proportional to 268,321.39, 402,495.86 and 68,643.50 is: 102,968.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,321.39 : 402,495.86 = 68,643.50 : x
  2. Step 2: Convert to fraction form
    268,321.39/402,495.86 = 68,643.50/x
  3. Step 3: Cross multiply
    268,321.39x = 402,495.86 × 68,643.50
  4. Step 4: Simplify right side
    268,321.39x = 27,628,722,725.04
  5. Step 5: Solve for x
    x = 27,628,722,725.04/268,321.39
  6. Step 6: Final answer
    x = 102,968.77

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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.