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Finding the Fourth Proportional to 70,609.87, 105,914.72 and 18,019.36

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Solution

The fourth proportional to 70,609.87, 105,914.72 and 18,019.36 is: 27,029.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,609.87 : 105,914.72 = 18,019.36 : x
  2. Step 2: Convert to fraction form
    70,609.87/105,914.72 = 18,019.36/x
  3. Step 3: Cross multiply
    70,609.87x = 105,914.72 × 18,019.36
  4. Step 4: Simplify right side
    70,609.87x = 1,908,515,181.67
  5. Step 5: Solve for x
    x = 1,908,515,181.67/70,609.87
  6. Step 6: Final answer
    x = 27,029.01

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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.