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Finding the Fourth Proportional to 103,956.71, 155,951.89 and 40,742.56

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Solution

The fourth proportional to 103,956.71, 155,951.89 and 40,742.56 is: 61,120.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,956.71 : 155,951.89 = 40,742.56 : x
  2. Step 2: Convert to fraction form
    103,956.71/155,951.89 = 40,742.56/x
  3. Step 3: Cross multiply
    103,956.71x = 155,951.89 × 40,742.56
  4. Step 4: Simplify right side
    103,956.71x = 6,353,879,235.44
  5. Step 5: Solve for x
    x = 6,353,879,235.44/103,956.71
  6. Step 6: Final answer
    x = 61,120.43

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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.