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Finding the Fourth Proportional to 91,968.20, 137,879.40 and 50,415.20

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Solution

The fourth proportional to 91,968.20, 137,879.40 and 50,415.20 is: 75,582.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,968.20 : 137,879.40 = 50,415.20 : x
  2. Step 2: Convert to fraction form
    91,968.20/137,879.40 = 50,415.20/x
  3. Step 3: Cross multiply
    91,968.20x = 137,879.40 × 50,415.20
  4. Step 4: Simplify right side
    91,968.20x = 6,951,217,526.88
  5. Step 5: Solve for x
    x = 6,951,217,526.88/91,968.20
  6. Step 6: Final answer
    x = 75,582.84

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1.5x scale

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.