Home / 79,890.62-119,840.44-20,724.72

Finding the Fourth Proportional to 79,890.62, 119,840.44 and 20,724.72

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Solution

The fourth proportional to 79,890.62, 119,840.44 and 20,724.72 is: 31,088.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,890.62 : 119,840.44 = 20,724.72 : x
  2. Step 2: Convert to fraction form
    79,890.62/119,840.44 = 20,724.72/x
  3. Step 3: Cross multiply
    79,890.62x = 119,840.44 × 20,724.72
  4. Step 4: Simplify right side
    79,890.62x = 2,483,659,563.68
  5. Step 5: Solve for x
    x = 2,483,659,563.68/79,890.62
  6. Step 6: Final answer
    x = 31,088.25

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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.