Home / 220,081.31-303,713.48-129,441.09

Finding the Fourth Proportional to 220,081.31, 303,713.48 and 129,441.09

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Solution

The fourth proportional to 220,081.31, 303,713.48 and 129,441.09 is: 178,629.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,081.31 : 303,713.48 = 129,441.09 : x
  2. Step 2: Convert to fraction form
    220,081.31/303,713.48 = 129,441.09/x
  3. Step 3: Cross multiply
    220,081.31x = 303,713.48 × 129,441.09
  4. Step 4: Simplify right side
    220,081.31x = 39,313,003,898.89
  5. Step 5: Solve for x
    x = 39,313,003,898.89/220,081.31
  6. Step 6: Final answer
    x = 178,629.45

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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.