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Finding the Fourth Proportional to 108,709.92, 149,956.14 and 68,359.80

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Solution

The fourth proportional to 108,709.92, 149,956.14 and 68,359.80 is: 94,296.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,709.92 : 149,956.14 = 68,359.80 : x
  2. Step 2: Convert to fraction form
    108,709.92/149,956.14 = 68,359.80/x
  3. Step 3: Cross multiply
    108,709.92x = 149,956.14 × 68,359.80
  4. Step 4: Simplify right side
    108,709.92x = 10,250,971,739.17
  5. Step 5: Solve for x
    x = 10,250,971,739.17/108,709.92
  6. Step 6: Final answer
    x = 94,296.56

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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.