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Finding the Fourth Proportional to 201,212.60, 301,855.35 and 101,120.90

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Solution

The fourth proportional to 201,212.60, 301,855.35 and 101,120.90 is: 151,699.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,212.60 : 301,855.35 = 101,120.90 : x
  2. Step 2: Convert to fraction form
    201,212.60/301,855.35 = 101,120.90/x
  3. Step 3: Cross multiply
    201,212.60x = 301,855.35 × 101,120.90
  4. Step 4: Simplify right side
    201,212.60x = 30,523,884,661.82
  5. Step 5: Solve for x
    x = 30,523,884,661.82/201,212.60
  6. Step 6: Final answer
    x = 151,699.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.