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Finding the Fourth Proportional to 79,479.60, 119,215.36 and 20,311.74

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Solution

The fourth proportional to 79,479.60, 119,215.36 and 20,311.74 is: 30,466.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,479.60 : 119,215.36 = 20,311.74 : x
  2. Step 2: Convert to fraction form
    79,479.60/119,215.36 = 20,311.74/x
  3. Step 3: Cross multiply
    79,479.60x = 119,215.36 × 20,311.74
  4. Step 4: Simplify right side
    79,479.60x = 2,421,471,396.33
  5. Step 5: Solve for x
    x = 2,421,471,396.33/79,479.60
  6. Step 6: Final answer
    x = 30,466.58

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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.