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Finding the Fourth Proportional to 73,169.44, 109,678.82 and 28,778.20

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Solution

The fourth proportional to 73,169.44, 109,678.82 and 28,778.20 is: 43,137.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,169.44 : 109,678.82 = 28,778.20 : x
  2. Step 2: Convert to fraction form
    73,169.44/109,678.82 = 28,778.20/x
  3. Step 3: Cross multiply
    73,169.44x = 109,678.82 × 28,778.20
  4. Step 4: Simplify right side
    73,169.44x = 3,156,359,017.72
  5. Step 5: Solve for x
    x = 3,156,359,017.72/73,169.44
  6. Step 6: Final answer
    x = 43,137.67

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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.