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Finding the Fourth Proportional to 91,968.70, 137,880.15 and 50,415.70

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Solution

The fourth proportional to 91,968.70, 137,880.15 and 50,415.70 is: 75,583.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,968.70 : 137,880.15 = 50,415.70 : x
  2. Step 2: Convert to fraction form
    91,968.70/137,880.15 = 50,415.70/x
  3. Step 3: Cross multiply
    91,968.70x = 137,880.15 × 50,415.70
  4. Step 4: Simplify right side
    91,968.70x = 6,951,324,278.36
  5. Step 5: Solve for x
    x = 6,951,324,278.36/91,968.70
  6. Step 6: Final answer
    x = 75,583.59

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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.