Home / 129,846.18-179,190-76,169.88

Finding the Fourth Proportional to 129,846.18, 179,190 and 76,169.88

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Solution

The fourth proportional to 129,846.18, 179,190 and 76,169.88 is: 105,115.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,846.18 : 179,190 = 76,169.88 : x
  2. Step 2: Convert to fraction form
    129,846.18/179,190 = 76,169.88/x
  3. Step 3: Cross multiply
    129,846.18x = 179,190 × 76,169.88
  4. Step 4: Simplify right side
    129,846.18x = 13,648,880,797.20
  5. Step 5: Solve for x
    x = 13,648,880,797.20/129,846.18
  6. Step 6: Final answer
    x = 105,115.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.