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Finding the Fourth Proportional to 318,566.72, 477,850.08 and 81,909.56

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Solution

The fourth proportional to 318,566.72, 477,850.08 and 81,909.56 is: 122,864.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,566.72 : 477,850.08 = 81,909.56 : x
  2. Step 2: Convert to fraction form
    318,566.72/477,850.08 = 81,909.56/x
  3. Step 3: Cross multiply
    318,566.72x = 477,850.08 × 81,909.56
  4. Step 4: Simplify right side
    318,566.72x = 39,140,489,798.76
  5. Step 5: Solve for x
    x = 39,140,489,798.76/318,566.72
  6. Step 6: Final answer
    x = 122,864.34

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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.