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Finding the Fourth Proportional to 120,365.35, 166,103.88 and 69,377.67

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Solution

The fourth proportional to 120,365.35, 166,103.88 and 69,377.67 is: 95,741.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,365.35 : 166,103.88 = 69,377.67 : x
  2. Step 2: Convert to fraction form
    120,365.35/166,103.88 = 69,377.67/x
  3. Step 3: Cross multiply
    120,365.35x = 166,103.88 × 69,377.67
  4. Step 4: Simplify right side
    120,365.35x = 11,523,900,172.36
  5. Step 5: Solve for x
    x = 11,523,900,172.36/120,365.35
  6. Step 6: Final answer
    x = 95,741.01

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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.