Home / 79,605.21-119,409.02-20,439.57

Finding the Fourth Proportional to 79,605.21, 119,409.02 and 20,439.57

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Solution

The fourth proportional to 79,605.21, 119,409.02 and 20,439.57 is: 30,659.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,605.21 : 119,409.02 = 20,439.57 : x
  2. Step 2: Convert to fraction form
    79,605.21/119,409.02 = 20,439.57/x
  3. Step 3: Cross multiply
    79,605.21x = 119,409.02 × 20,439.57
  4. Step 4: Simplify right side
    79,605.21x = 2,440,668,523.87
  5. Step 5: Solve for x
    x = 2,440,668,523.87/79,605.21
  6. Step 6: Final answer
    x = 30,659.66

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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.