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Finding the Fourth Proportional to 248,582.80, 372,928.20 and 90,811

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Solution

The fourth proportional to 248,582.80, 372,928.20 and 90,811 is: 136,236.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,582.80 : 372,928.20 = 90,811 : x
  2. Step 2: Convert to fraction form
    248,582.80/372,928.20 = 90,811/x
  3. Step 3: Cross multiply
    248,582.80x = 372,928.20 × 90,811
  4. Step 4: Simplify right side
    248,582.80x = 33,865,982,770.20
  5. Step 5: Solve for x
    x = 33,865,982,770.20/248,582.80
  6. Step 6: Final answer
    x = 136,236.23

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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.