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Finding the Fourth Proportional to 56,221.82, 84,300.83 and 18,761.55

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Solution

The fourth proportional to 56,221.82, 84,300.83 and 18,761.55 is: 28,131.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,221.82 : 84,300.83 = 18,761.55 : x
  2. Step 2: Convert to fraction form
    56,221.82/84,300.83 = 18,761.55/x
  3. Step 3: Cross multiply
    56,221.82x = 84,300.83 × 18,761.55
  4. Step 4: Simplify right side
    56,221.82x = 1,581,613,815.58
  5. Step 5: Solve for x
    x = 1,581,613,815.58/56,221.82
  6. Step 6: Final answer
    x = 28,131.67

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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.