Home / 129,789.80-194,295.90-77,172.20

Finding the Fourth Proportional to 129,789.80, 194,295.90 and 77,172.20

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Solution

The fourth proportional to 129,789.80, 194,295.90 and 77,172.20 is: 115,527.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,789.80 : 194,295.90 = 77,172.20 : x
  2. Step 2: Convert to fraction form
    129,789.80/194,295.90 = 77,172.20/x
  3. Step 3: Cross multiply
    129,789.80x = 194,295.90 × 77,172.20
  4. Step 4: Simplify right side
    129,789.80x = 14,994,242,053.98
  5. Step 5: Solve for x
    x = 14,994,242,053.98/129,789.80
  6. Step 6: Final answer
    x = 115,527.12

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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.