Home / 129,419.09-194,130.08-45,179.36

Finding the Fourth Proportional to 129,419.09, 194,130.08 and 45,179.36

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Solution

The fourth proportional to 129,419.09, 194,130.08 and 45,179.36 is: 67,769.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,419.09 : 194,130.08 = 45,179.36 : x
  2. Step 2: Convert to fraction form
    129,419.09/194,130.08 = 45,179.36/x
  3. Step 3: Cross multiply
    129,419.09x = 194,130.08 × 45,179.36
  4. Step 4: Simplify right side
    129,419.09x = 8,770,672,771.15
  5. Step 5: Solve for x
    x = 8,770,672,771.15/129,419.09
  6. Step 6: Final answer
    x = 67,769.54

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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.