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Finding the Fourth Proportional to 45,067.80, 67,602.60 and 13,903

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Solution

The fourth proportional to 45,067.80, 67,602.60 and 13,903 is: 20,854.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,067.80 : 67,602.60 = 13,903 : x
  2. Step 2: Convert to fraction form
    45,067.80/67,602.60 = 13,903/x
  3. Step 3: Cross multiply
    45,067.80x = 67,602.60 × 13,903
  4. Step 4: Simplify right side
    45,067.80x = 939,878,947.80
  5. Step 5: Solve for x
    x = 939,878,947.80/45,067.80
  6. Step 6: Final answer
    x = 20,854.78

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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.