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Finding the Fourth Proportional to 201,790.88, 278,468.88 and 111,145.04

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Solution

The fourth proportional to 201,790.88, 278,468.88 and 111,145.04 is: 153,378.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,790.88 : 278,468.88 = 111,145.04 : x
  2. Step 2: Convert to fraction form
    201,790.88/278,468.88 = 111,145.04/x
  3. Step 3: Cross multiply
    201,790.88x = 278,468.88 × 111,145.04
  4. Step 4: Simplify right side
    201,790.88x = 30,950,434,806.36
  5. Step 5: Solve for x
    x = 30,950,434,806.36/201,790.88
  6. Step 6: Final answer
    x = 153,378.76

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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.