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Finding the Fourth Proportional to 194,785.40, 292,105.20 and 68,376.80

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Solution

The fourth proportional to 194,785.40, 292,105.20 and 68,376.80 is: 102,539.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,785.40 : 292,105.20 = 68,376.80 : x
  2. Step 2: Convert to fraction form
    194,785.40/292,105.20 = 68,376.80/x
  3. Step 3: Cross multiply
    194,785.40x = 292,105.20 × 68,376.80
  4. Step 4: Simplify right side
    194,785.40x = 19,973,218,839.36
  5. Step 5: Solve for x
    x = 19,973,218,839.36/194,785.40
  6. Step 6: Final answer
    x = 102,539.61

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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.