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Finding the Fourth Proportional to 72,067.80, 108,015.30 and 36,989.40

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Solution

The fourth proportional to 72,067.80, 108,015.30 and 36,989.40 is: 55,439.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,067.80 : 108,015.30 = 36,989.40 : x
  2. Step 2: Convert to fraction form
    72,067.80/108,015.30 = 36,989.40/x
  3. Step 3: Cross multiply
    72,067.80x = 108,015.30 × 36,989.40
  4. Step 4: Simplify right side
    72,067.80x = 3,995,421,137.82
  5. Step 5: Solve for x
    x = 3,995,421,137.82/72,067.80
  6. Step 6: Final answer
    x = 55,439.75

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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.