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Finding the Fourth Proportional to 63,780.70, 95,679.41 and 21,071.94

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Solution

The fourth proportional to 63,780.70, 95,679.41 and 21,071.94 is: 31,610.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,780.70 : 95,679.41 = 21,071.94 : x
  2. Step 2: Convert to fraction form
    63,780.70/95,679.41 = 21,071.94/x
  3. Step 3: Cross multiply
    63,780.70x = 95,679.41 × 21,071.94
  4. Step 4: Simplify right side
    63,780.70x = 2,016,150,786.76
  5. Step 5: Solve for x
    x = 2,016,150,786.76/63,780.70
  6. Step 6: Final answer
    x = 31,610.67

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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.