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Finding the Fourth Proportional to 135,540.80, 187,112.40 and 90,245.60

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Solution

The fourth proportional to 135,540.80, 187,112.40 and 90,245.60 is: 124,582.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,540.80 : 187,112.40 = 90,245.60 : x
  2. Step 2: Convert to fraction form
    135,540.80/187,112.40 = 90,245.60/x
  3. Step 3: Cross multiply
    135,540.80x = 187,112.40 × 90,245.60
  4. Step 4: Simplify right side
    135,540.80x = 16,886,070,805.44
  5. Step 5: Solve for x
    x = 16,886,070,805.44/135,540.80
  6. Step 6: Final answer
    x = 124,582.94

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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.