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Finding the Fourth Proportional to 68,987.55, 103,481.09 and 19,067.30

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Solution

The fourth proportional to 68,987.55, 103,481.09 and 19,067.30 is: 28,600.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,987.55 : 103,481.09 = 19,067.30 : x
  2. Step 2: Convert to fraction form
    68,987.55/103,481.09 = 19,067.30/x
  3. Step 3: Cross multiply
    68,987.55x = 103,481.09 × 19,067.30
  4. Step 4: Simplify right side
    68,987.55x = 1,973,104,941.43
  5. Step 5: Solve for x
    x = 1,973,104,941.43/68,987.55
  6. Step 6: Final answer
    x = 28,600.89

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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.