Home / 86,991.72-120,106.38-66,812.52

Finding the Fourth Proportional to 86,991.72, 120,106.38 and 66,812.52

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Solution

The fourth proportional to 86,991.72, 120,106.38 and 66,812.52 is: 92,245.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,991.72 : 120,106.38 = 66,812.52 : x
  2. Step 2: Convert to fraction form
    86,991.72/120,106.38 = 66,812.52/x
  3. Step 3: Cross multiply
    86,991.72x = 120,106.38 × 66,812.52
  4. Step 4: Simplify right side
    86,991.72x = 8,024,609,915.88
  5. Step 5: Solve for x
    x = 8,024,609,915.88/86,991.72
  6. Step 6: Final answer
    x = 92,245.67

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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.