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Finding the Fourth Proportional to 79,505.85, 119,257.94 and 20,341.05

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Solution

The fourth proportional to 79,505.85, 119,257.94 and 20,341.05 is: 30,511.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,505.85 : 119,257.94 = 20,341.05 : x
  2. Step 2: Convert to fraction form
    79,505.85/119,257.94 = 20,341.05/x
  3. Step 3: Cross multiply
    79,505.85x = 119,257.94 × 20,341.05
  4. Step 4: Simplify right side
    79,505.85x = 2,425,831,618.73
  5. Step 5: Solve for x
    x = 2,425,831,618.73/79,505.85
  6. Step 6: Final answer
    x = 30,511.36

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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.