Home / 129,502.20-194,138.10-76,855.80

Finding the Fourth Proportional to 129,502.20, 194,138.10 and 76,855.80

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Solution

The fourth proportional to 129,502.20, 194,138.10 and 76,855.80 is: 115,215.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,502.20 : 194,138.10 = 76,855.80 : x
  2. Step 2: Convert to fraction form
    129,502.20/194,138.10 = 76,855.80/x
  3. Step 3: Cross multiply
    129,502.20x = 194,138.10 × 76,855.80
  4. Step 4: Simplify right side
    129,502.20x = 14,920,638,985.98
  5. Step 5: Solve for x
    x = 14,920,638,985.98/129,502.20
  6. Step 6: Final answer
    x = 115,215.33

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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.