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Finding the Fourth Proportional to 73,003.76, 109,488.90 and 20,416.96

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Solution

The fourth proportional to 73,003.76, 109,488.90 and 20,416.96 is: 30,620.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,003.76 : 109,488.90 = 20,416.96 : x
  2. Step 2: Convert to fraction form
    73,003.76/109,488.90 = 20,416.96/x
  3. Step 3: Cross multiply
    73,003.76x = 109,488.90 × 20,416.96
  4. Step 4: Simplify right side
    73,003.76x = 2,235,430,491.74
  5. Step 5: Solve for x
    x = 2,235,430,491.74/73,003.76
  6. Step 6: Final answer
    x = 30,620.76

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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.