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Finding the Fourth Proportional to 108,372.81, 149,489.51 and 68,628.81

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Solution

The fourth proportional to 108,372.81, 149,489.51 and 68,628.81 is: 94,666.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,372.81 : 149,489.51 = 68,628.81 : x
  2. Step 2: Convert to fraction form
    108,372.81/149,489.51 = 68,628.81/x
  3. Step 3: Cross multiply
    108,372.81x = 149,489.51 × 68,628.81
  4. Step 4: Simplify right side
    108,372.81x = 10,259,286,835.64
  5. Step 5: Solve for x
    x = 10,259,286,835.64/108,372.81
  6. Step 6: Final answer
    x = 94,666.61

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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.