Home / 79,543.40-119,312.35-20,379.65

Finding the Fourth Proportional to 79,543.40, 119,312.35 and 20,379.65

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Solution

The fourth proportional to 79,543.40, 119,312.35 and 20,379.65 is: 30,568.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,543.40 : 119,312.35 = 20,379.65 : x
  2. Step 2: Convert to fraction form
    79,543.40/119,312.35 = 20,379.65/x
  3. Step 3: Cross multiply
    79,543.40x = 119,312.35 × 20,379.65
  4. Step 4: Simplify right side
    79,543.40x = 2,431,543,933.68
  5. Step 5: Solve for x
    x = 2,431,543,933.68/79,543.40
  6. Step 6: Final answer
    x = 30,568.77

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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.