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Finding the Fourth Proportional to 318,010.64, 477,013.52 and 81,352.94

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Solution

The fourth proportional to 318,010.64, 477,013.52 and 81,352.94 is: 122,028.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,010.64 : 477,013.52 = 81,352.94 : x
  2. Step 2: Convert to fraction form
    318,010.64/477,013.52 = 81,352.94/x
  3. Step 3: Cross multiply
    318,010.64x = 477,013.52 × 81,352.94
  4. Step 4: Simplify right side
    318,010.64x = 38,806,449,479.92
  5. Step 5: Solve for x
    x = 38,806,449,479.92/318,010.64
  6. Step 6: Final answer
    x = 122,028.78

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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.