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Finding the Fourth Proportional to 70,609.65, 105,914.40 and 18,019.13

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Solution

The fourth proportional to 70,609.65, 105,914.40 and 18,019.13 is: 27,028.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,609.65 : 105,914.40 = 18,019.13 : x
  2. Step 2: Convert to fraction form
    70,609.65/105,914.40 = 18,019.13/x
  3. Step 3: Cross multiply
    70,609.65x = 105,914.40 × 18,019.13
  4. Step 4: Simplify right side
    70,609.65x = 1,908,485,342.47
  5. Step 5: Solve for x
    x = 1,908,485,342.47/70,609.65
  6. Step 6: Final answer
    x = 27,028.68

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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.