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Finding the Fourth Proportional to 70,899.62, 106,366.41 and 20,299.35

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Solution

The fourth proportional to 70,899.62, 106,366.41 and 20,299.35 is: 30,453.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,899.62 : 106,366.41 = 20,299.35 : x
  2. Step 2: Convert to fraction form
    70,899.62/106,366.41 = 20,299.35/x
  3. Step 3: Cross multiply
    70,899.62x = 106,366.41 × 20,299.35
  4. Step 4: Simplify right side
    70,899.62x = 2,159,169,200.00
  5. Step 5: Solve for x
    x = 2,159,169,200.00/70,899.62
  6. Step 6: Final answer
    x = 30,453.89

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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.