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Finding the Fourth Proportional to 318,068.28, 477,102.11 and 81,410.58

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Solution

The fourth proportional to 318,068.28, 477,102.11 and 81,410.58 is: 122,115.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,068.28 : 477,102.11 = 81,410.58 : x
  2. Step 2: Convert to fraction form
    318,068.28/477,102.11 = 81,410.58/x
  3. Step 3: Cross multiply
    318,068.28x = 477,102.11 × 81,410.58
  4. Step 4: Simplify right side
    318,068.28x = 38,841,159,087.27
  5. Step 5: Solve for x
    x = 38,841,159,087.27/318,068.28
  6. Step 6: Final answer
    x = 122,115.79

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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.