Home / 86,923-120,011.35-66,743.67

Finding the Fourth Proportional to 86,923, 120,011.35 and 66,743.67

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Solution

The fourth proportional to 86,923, 120,011.35 and 66,743.67 is: 92,150.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,923 : 120,011.35 = 66,743.67 : x
  2. Step 2: Convert to fraction form
    86,923/120,011.35 = 66,743.67/x
  3. Step 3: Cross multiply
    86,923x = 120,011.35 × 66,743.67
  4. Step 4: Simplify right side
    86,923x = 8,009,997,940.65
  5. Step 5: Solve for x
    x = 8,009,997,940.65/86,923
  6. Step 6: Final answer
    x = 92,150.50

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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.