Home / 129,789.45-179,147.75-76,086.09

Finding the Fourth Proportional to 129,789.45, 179,147.75 and 76,086.09

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Solution

The fourth proportional to 129,789.45, 179,147.75 and 76,086.09 is: 105,021.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,789.45 : 179,147.75 = 76,086.09 : x
  2. Step 2: Convert to fraction form
    129,789.45/179,147.75 = 76,086.09/x
  3. Step 3: Cross multiply
    129,789.45x = 179,147.75 × 76,086.09
  4. Step 4: Simplify right side
    129,789.45x = 13,630,651,449.37
  5. Step 5: Solve for x
    x = 13,630,651,449.37/129,789.45
  6. Step 6: Final answer
    x = 105,021.26

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1.5x scale

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.