Home / 154,790.40-213,609.60-87,724.80

Finding the Fourth Proportional to 154,790.40, 213,609.60 and 87,724.80

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Solution

The fourth proportional to 154,790.40, 213,609.60 and 87,724.80 is: 121,059.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,790.40 : 213,609.60 = 87,724.80 : x
  2. Step 2: Convert to fraction form
    154,790.40/213,609.60 = 87,724.80/x
  3. Step 3: Cross multiply
    154,790.40x = 213,609.60 × 87,724.80
  4. Step 4: Simplify right side
    154,790.40x = 18,738,859,438.08
  5. Step 5: Solve for x
    x = 18,738,859,438.08/154,790.40
  6. Step 6: Final answer
    x = 121,059.57

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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.