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Finding the Fourth Proportional to 74,379.20, 111,568.79 and 18,975.20

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Solution

The fourth proportional to 74,379.20, 111,568.79 and 18,975.20 is: 28,462.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,379.20 : 111,568.79 = 18,975.20 : x
  2. Step 2: Convert to fraction form
    74,379.20/111,568.79 = 18,975.20/x
  3. Step 3: Cross multiply
    74,379.20x = 111,568.79 × 18,975.20
  4. Step 4: Simplify right side
    74,379.20x = 2,117,039,451.29
  5. Step 5: Solve for x
    x = 2,117,039,451.29/74,379.20
  6. Step 6: Final answer
    x = 28,462.79

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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.