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Finding the Fourth Proportional to 70,609.70, 105,914.50 and 18,019.20

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Solution

The fourth proportional to 70,609.70, 105,914.50 and 18,019.20 is: 27,028.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,609.70 : 105,914.50 = 18,019.20 : x
  2. Step 2: Convert to fraction form
    70,609.70/105,914.50 = 18,019.20/x
  3. Step 3: Cross multiply
    70,609.70x = 105,914.50 × 18,019.20
  4. Step 4: Simplify right side
    70,609.70x = 1,908,494,558.40
  5. Step 5: Solve for x
    x = 1,908,494,558.40/70,609.70
  6. Step 6: Final answer
    x = 27,028.79

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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.