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Finding the Fourth Proportional to 318,694.33, 478,092.93 and 129,166.48

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Solution

The fourth proportional to 318,694.33, 478,092.93 and 129,166.48 is: 193,770.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,694.33 : 478,092.93 = 129,166.48 : x
  2. Step 2: Convert to fraction form
    318,694.33/478,092.93 = 129,166.48/x
  3. Step 3: Cross multiply
    318,694.33x = 478,092.93 × 129,166.48
  4. Step 4: Simplify right side
    318,694.33x = 61,753,580,880.99
  5. Step 5: Solve for x
    x = 61,753,580,880.99/318,694.33
  6. Step 6: Final answer
    x = 193,770.57

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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.