Home / 129,381.80-194,072.70-76,764.20

Finding the Fourth Proportional to 129,381.80, 194,072.70 and 76,764.20

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Solution

The fourth proportional to 129,381.80, 194,072.70 and 76,764.20 is: 115,146.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,381.80 : 194,072.70 = 76,764.20 : x
  2. Step 2: Convert to fraction form
    129,381.80/194,072.70 = 76,764.20/x
  3. Step 3: Cross multiply
    129,381.80x = 194,072.70 × 76,764.20
  4. Step 4: Simplify right side
    129,381.80x = 14,897,835,557.34
  5. Step 5: Solve for x
    x = 14,897,835,557.34/129,381.80
  6. Step 6: Final answer
    x = 115,146.30

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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.