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Finding the Fourth Proportional to 86,967.41, 120,072.60 and 66,788.09

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Solution

The fourth proportional to 86,967.41, 120,072.60 and 66,788.09 is: 92,211.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,967.41 : 120,072.60 = 66,788.09 : x
  2. Step 2: Convert to fraction form
    86,967.41/120,072.60 = 66,788.09/x
  3. Step 3: Cross multiply
    86,967.41x = 120,072.60 × 66,788.09
  4. Step 4: Simplify right side
    86,967.41x = 8,019,419,014.97
  5. Step 5: Solve for x
    x = 8,019,419,014.97/86,967.41
  6. Step 6: Final answer
    x = 92,211.77

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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.