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Finding the Fourth Proportional to 318,766.83, 478,213.35 and 91,064.42

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Solution

The fourth proportional to 318,766.83, 478,213.35 and 91,064.42 is: 136,614.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,766.83 : 478,213.35 = 91,064.42 : x
  2. Step 2: Convert to fraction form
    318,766.83/478,213.35 = 91,064.42/x
  3. Step 3: Cross multiply
    318,766.83x = 478,213.35 × 91,064.42
  4. Step 4: Simplify right side
    318,766.83x = 43,548,218,507.62
  5. Step 5: Solve for x
    x = 43,548,218,507.62/318,766.83
  6. Step 6: Final answer
    x = 136,614.65

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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.