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Finding the Fourth Proportional to 108,428.25, 149,723.33 and 68,209.32

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Solution

The fourth proportional to 108,428.25, 149,723.33 and 68,209.32 is: 94,186.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,428.25 : 149,723.33 = 68,209.32 : x
  2. Step 2: Convert to fraction form
    108,428.25/149,723.33 = 68,209.32/x
  3. Step 3: Cross multiply
    108,428.25x = 149,723.33 × 68,209.32
  4. Step 4: Simplify right side
    108,428.25x = 10,212,526,186.39
  5. Step 5: Solve for x
    x = 10,212,526,186.39/108,428.25
  6. Step 6: Final answer
    x = 94,186.95

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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.