Home / 129,576.09-178,817.96-72,221.31

Finding the Fourth Proportional to 129,576.09, 178,817.96 and 72,221.31

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Solution

The fourth proportional to 129,576.09, 178,817.96 and 72,221.31 is: 99,667.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,576.09 : 178,817.96 = 72,221.31 : x
  2. Step 2: Convert to fraction form
    129,576.09/178,817.96 = 72,221.31/x
  3. Step 3: Cross multiply
    129,576.09x = 178,817.96 × 72,221.31
  4. Step 4: Simplify right side
    129,576.09x = 12,914,467,322.73
  5. Step 5: Solve for x
    x = 12,914,467,322.73/129,576.09
  6. Step 6: Final answer
    x = 99,667.06

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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.