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Finding the Fourth Proportional to 79,660.80, 119,491.20 and 67,219.20

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Solution

The fourth proportional to 79,660.80, 119,491.20 and 67,219.20 is: 100,828.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,660.80 : 119,491.20 = 67,219.20 : x
  2. Step 2: Convert to fraction form
    79,660.80/119,491.20 = 67,219.20/x
  3. Step 3: Cross multiply
    79,660.80x = 119,491.20 × 67,219.20
  4. Step 4: Simplify right side
    79,660.80x = 8,032,102,871.04
  5. Step 5: Solve for x
    x = 8,032,102,871.04/79,660.80
  6. Step 6: Final answer
    x = 100,828.80

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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.