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Finding the Fourth Proportional to 318,751.34, 478,012.22 and 105,479.89

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Solution

The fourth proportional to 318,751.34, 478,012.22 and 105,479.89 is: 158,181.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,751.34 : 478,012.22 = 105,479.89 : x
  2. Step 2: Convert to fraction form
    318,751.34/478,012.22 = 105,479.89/x
  3. Step 3: Cross multiply
    318,751.34x = 478,012.22 × 105,479.89
  4. Step 4: Simplify right side
    318,751.34x = 50,420,675,057.38
  5. Step 5: Solve for x
    x = 50,420,675,057.38/318,751.34
  6. Step 6: Final answer
    x = 158,181.85

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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.