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Finding the Fourth Proportional to 318,005.98, 477,004.11 and 81,346.66

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Solution

The fourth proportional to 318,005.98, 477,004.11 and 81,346.66 is: 122,018.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,005.98 : 477,004.11 = 81,346.66 : x
  2. Step 2: Convert to fraction form
    318,005.98/477,004.11 = 81,346.66/x
  3. Step 3: Cross multiply
    318,005.98x = 477,004.11 × 81,346.66
  4. Step 4: Simplify right side
    318,005.98x = 38,802,691,154.77
  5. Step 5: Solve for x
    x = 38,802,691,154.77/318,005.98
  6. Step 6: Final answer
    x = 122,018.75

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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.