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Finding the Fourth Proportional to 70,609.40, 105,914.03 and 18,018.88

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Solution

The fourth proportional to 70,609.40, 105,914.03 and 18,018.88 is: 27,028.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,609.40 : 105,914.03 = 18,018.88 : x
  2. Step 2: Convert to fraction form
    70,609.40/105,914.03 = 18,018.88/x
  3. Step 3: Cross multiply
    70,609.40x = 105,914.03 × 18,018.88
  4. Step 4: Simplify right side
    70,609.40x = 1,908,451,842.01
  5. Step 5: Solve for x
    x = 1,908,451,842.01/70,609.40
  6. Step 6: Final answer
    x = 27,028.30

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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.