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Finding the Fourth Proportional to 129,680.80, 194,089.20 and 94,040.80

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Solution

The fourth proportional to 129,680.80, 194,089.20 and 94,040.80 is: 140,747.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,680.80 : 194,089.20 = 94,040.80 : x
  2. Step 2: Convert to fraction form
    129,680.80/194,089.20 = 94,040.80/x
  3. Step 3: Cross multiply
    129,680.80x = 194,089.20 × 94,040.80
  4. Step 4: Simplify right side
    129,680.80x = 18,252,303,639.36
  5. Step 5: Solve for x
    x = 18,252,303,639.36/129,680.80
  6. Step 6: Final answer
    x = 140,747.93

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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.