Home / 76,790.85-115,188.09-20,631.03

Finding the Fourth Proportional to 76,790.85, 115,188.09 and 20,631.03

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Solution

The fourth proportional to 76,790.85, 115,188.09 and 20,631.03 is: 30,947.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,790.85 : 115,188.09 = 20,631.03 : x
  2. Step 2: Convert to fraction form
    76,790.85/115,188.09 = 20,631.03/x
  3. Step 3: Cross multiply
    76,790.85x = 115,188.09 × 20,631.03
  4. Step 4: Simplify right side
    76,790.85x = 2,376,448,940.43
  5. Step 5: Solve for x
    x = 2,376,448,940.43/76,790.85
  6. Step 6: Final answer
    x = 30,947.03

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1.5x scale

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.