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Finding the Fourth Proportional to 70,221.97, 105,328.85 and 20,300.96

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Solution

The fourth proportional to 70,221.97, 105,328.85 and 20,300.96 is: 30,450.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,221.97 : 105,328.85 = 20,300.96 : x
  2. Step 2: Convert to fraction form
    70,221.97/105,328.85 = 20,300.96/x
  3. Step 3: Cross multiply
    70,221.97x = 105,328.85 × 20,300.96
  4. Step 4: Simplify right side
    70,221.97x = 2,138,276,770.70
  5. Step 5: Solve for x
    x = 2,138,276,770.70/70,221.97
  6. Step 6: Final answer
    x = 30,450.25

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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.