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Finding the Fourth Proportional to 318,007.98, 477,007.11 and 81,348.66

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Solution

The fourth proportional to 318,007.98, 477,007.11 and 81,348.66 is: 122,021.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,007.98 : 477,007.11 = 81,348.66 : x
  2. Step 2: Convert to fraction form
    318,007.98/477,007.11 = 81,348.66/x
  3. Step 3: Cross multiply
    318,007.98x = 477,007.11 × 81,348.66
  4. Step 4: Simplify right side
    318,007.98x = 38,803,889,208.97
  5. Step 5: Solve for x
    x = 38,803,889,208.97/318,007.98
  6. Step 6: Final answer
    x = 122,021.75

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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.