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Finding the Fourth Proportional to 108,309.53, 149,512.62 and 65,882.81

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Solution

The fourth proportional to 108,309.53, 149,512.62 and 65,882.81 is: 90,945.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,309.53 : 149,512.62 = 65,882.81 : x
  2. Step 2: Convert to fraction form
    108,309.53/149,512.62 = 65,882.81/x
  3. Step 3: Cross multiply
    108,309.53x = 149,512.62 × 65,882.81
  4. Step 4: Simplify right side
    108,309.53x = 9,850,310,788.50
  5. Step 5: Solve for x
    x = 9,850,310,788.50/108,309.53
  6. Step 6: Final answer
    x = 90,945.93

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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.