Home / 201,919.40-302,879.10-138,933.80

Finding the Fourth Proportional to 201,919.40, 302,879.10 and 138,933.80

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Solution

The fourth proportional to 201,919.40, 302,879.10 and 138,933.80 is: 208,400.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,919.40 : 302,879.10 = 138,933.80 : x
  2. Step 2: Convert to fraction form
    201,919.40/302,879.10 = 138,933.80/x
  3. Step 3: Cross multiply
    201,919.40x = 302,879.10 × 138,933.80
  4. Step 4: Simplify right side
    201,919.40x = 42,080,144,303.58
  5. Step 5: Solve for x
    x = 42,080,144,303.58/201,919.40
  6. Step 6: Final answer
    x = 208,400.70

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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.