Home / 129,917.40-194,730.30-66,713.10

Finding the Fourth Proportional to 129,917.40, 194,730.30 and 66,713.10

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Solution

The fourth proportional to 129,917.40, 194,730.30 and 66,713.10 is: 99,994.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,917.40 : 194,730.30 = 66,713.10 : x
  2. Step 2: Convert to fraction form
    129,917.40/194,730.30 = 66,713.10/x
  3. Step 3: Cross multiply
    129,917.40x = 194,730.30 × 66,713.10
  4. Step 4: Simplify right side
    129,917.40x = 12,991,061,976.93
  5. Step 5: Solve for x
    x = 12,991,061,976.93/129,917.40
  6. Step 6: Final answer
    x = 99,994.78

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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.