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Finding the Fourth Proportional to 79,713.80, 119,570.70 and 67,029.20

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Solution

The fourth proportional to 79,713.80, 119,570.70 and 67,029.20 is: 100,543.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,713.80 : 119,570.70 = 67,029.20 : x
  2. Step 2: Convert to fraction form
    79,713.80/119,570.70 = 67,029.20/x
  3. Step 3: Cross multiply
    79,713.80x = 119,570.70 × 67,029.20
  4. Step 4: Simplify right side
    79,713.80x = 8,014,728,364.44
  5. Step 5: Solve for x
    x = 8,014,728,364.44/79,713.80
  6. Step 6: Final answer
    x = 100,543.80

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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.