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Finding the Fourth Proportional to 70,221.94, 105,317.49 and 20,291.17

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Solution

The fourth proportional to 70,221.94, 105,317.49 and 20,291.17 is: 30,432.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,221.94 : 105,317.49 = 20,291.17 : x
  2. Step 2: Convert to fraction form
    70,221.94/105,317.49 = 20,291.17/x
  3. Step 3: Cross multiply
    70,221.94x = 105,317.49 × 20,291.17
  4. Step 4: Simplify right side
    70,221.94x = 2,137,015,093.56
  5. Step 5: Solve for x
    x = 2,137,015,093.56/70,221.94
  6. Step 6: Final answer
    x = 30,432.30

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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.