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Finding the Fourth Proportional to 108,729.54, 149,983.04 and 68,379.30

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Solution

The fourth proportional to 108,729.54, 149,983.04 and 68,379.30 is: 94,323.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,729.54 : 149,983.04 = 68,379.30 : x
  2. Step 2: Convert to fraction form
    108,729.54/149,983.04 = 68,379.30/x
  3. Step 3: Cross multiply
    108,729.54x = 149,983.04 × 68,379.30
  4. Step 4: Simplify right side
    108,729.54x = 10,255,735,287.07
  5. Step 5: Solve for x
    x = 10,255,735,287.07/108,729.54
  6. Step 6: Final answer
    x = 94,323.36

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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.