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Finding the Fourth Proportional to 70,054.05, 105,069.80 and 20,122.79

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Solution

The fourth proportional to 70,054.05, 105,069.80 and 20,122.79 is: 30,180.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,054.05 : 105,069.80 = 20,122.79 : x
  2. Step 2: Convert to fraction form
    70,054.05/105,069.80 = 20,122.79/x
  3. Step 3: Cross multiply
    70,054.05x = 105,069.80 × 20,122.79
  4. Step 4: Simplify right side
    70,054.05x = 2,114,297,770.32
  5. Step 5: Solve for x
    x = 2,114,297,770.32/70,054.05
  6. Step 6: Final answer
    x = 30,180.95

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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.