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Finding the Fourth Proportional to 120,479.94, 166,263.71 and 66,765.87

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Solution

The fourth proportional to 120,479.94, 166,263.71 and 66,765.87 is: 92,137.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,479.94 : 166,263.71 = 66,765.87 : x
  2. Step 2: Convert to fraction form
    120,479.94/166,263.71 = 66,765.87/x
  3. Step 3: Cross multiply
    120,479.94x = 166,263.71 × 66,765.87
  4. Step 4: Simplify right side
    120,479.94x = 11,100,740,913.75
  5. Step 5: Solve for x
    x = 11,100,740,913.75/120,479.94
  6. Step 6: Final answer
    x = 92,137.67

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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.