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Finding the Fourth Proportional to 318,672.06, 478,174.68 and 129,152.58

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Solution

The fourth proportional to 318,672.06, 478,174.68 and 129,152.58 is: 193,796.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,672.06 : 478,174.68 = 129,152.58 : x
  2. Step 2: Convert to fraction form
    318,672.06/478,174.68 = 129,152.58/x
  3. Step 3: Cross multiply
    318,672.06x = 478,174.68 × 129,152.58
  4. Step 4: Simplify right side
    318,672.06x = 61,757,493,612.67
  5. Step 5: Solve for x
    x = 61,757,493,612.67/318,672.06
  6. Step 6: Final answer
    x = 193,796.39

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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.