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Finding the Fourth Proportional to 201,906.80, 302,860.20 and 139,698.80

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Solution

The fourth proportional to 201,906.80, 302,860.20 and 139,698.80 is: 209,548.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,906.80 : 302,860.20 = 139,698.80 : x
  2. Step 2: Convert to fraction form
    201,906.80/302,860.20 = 139,698.80/x
  3. Step 3: Cross multiply
    201,906.80x = 302,860.20 × 139,698.80
  4. Step 4: Simplify right side
    201,906.80x = 42,309,206,507.76
  5. Step 5: Solve for x
    x = 42,309,206,507.76/201,906.80
  6. Step 6: Final answer
    x = 209,548.20

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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.