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Finding the Fourth Proportional to 54,312.64, 81,481.70 and 16,870.78

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Solution

The fourth proportional to 54,312.64, 81,481.70 and 16,870.78 is: 25,310.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,312.64 : 81,481.70 = 16,870.78 : x
  2. Step 2: Convert to fraction form
    54,312.64/81,481.70 = 16,870.78/x
  3. Step 3: Cross multiply
    54,312.64x = 81,481.70 × 16,870.78
  4. Step 4: Simplify right side
    54,312.64x = 1,374,659,834.73
  5. Step 5: Solve for x
    x = 1,374,659,834.73/54,312.64
  6. Step 6: Final answer
    x = 25,310.13

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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.