Home / 129,885.09-194,889.26-89,965.45

Finding the Fourth Proportional to 129,885.09, 194,889.26 and 89,965.45

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Solution

The fourth proportional to 129,885.09, 194,889.26 and 89,965.45 is: 134,990.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,885.09 : 194,889.26 = 89,965.45 : x
  2. Step 2: Convert to fraction form
    129,885.09/194,889.26 = 89,965.45/x
  3. Step 3: Cross multiply
    129,885.09x = 194,889.26 × 89,965.45
  4. Step 4: Simplify right side
    129,885.09x = 17,533,299,976.07
  5. Step 5: Solve for x
    x = 17,533,299,976.07/129,885.09
  6. Step 6: Final answer
    x = 134,990.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.