Home / 72,138.19-108,173.23-42,161.03

Finding the Fourth Proportional to 72,138.19, 108,173.23 and 42,161.03

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Solution

The fourth proportional to 72,138.19, 108,173.23 and 42,161.03 is: 63,221.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,138.19 : 108,173.23 = 42,161.03 : x
  2. Step 2: Convert to fraction form
    72,138.19/108,173.23 = 42,161.03/x
  3. Step 3: Cross multiply
    72,138.19x = 108,173.23 × 42,161.03
  4. Step 4: Simplify right side
    72,138.19x = 4,560,694,043.56
  5. Step 5: Solve for x
    x = 4,560,694,043.56/72,138.19
  6. Step 6: Final answer
    x = 63,221.64

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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.