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Finding the Fourth Proportional to 72,713.65, 109,072.89 and 20,118.73

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Solution

The fourth proportional to 72,713.65, 109,072.89 and 20,118.73 is: 30,178.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,713.65 : 109,072.89 = 20,118.73 : x
  2. Step 2: Convert to fraction form
    72,713.65/109,072.89 = 20,118.73/x
  3. Step 3: Cross multiply
    72,713.65x = 109,072.89 × 20,118.73
  4. Step 4: Simplify right side
    72,713.65x = 2,194,408,024.23
  5. Step 5: Solve for x
    x = 2,194,408,024.23/72,713.65
  6. Step 6: Final answer
    x = 30,178.76

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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.