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Finding the Fourth Proportional to 54,321.70, 81,490.65 and 19,258.60

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Solution

The fourth proportional to 54,321.70, 81,490.65 and 19,258.60 is: 28,890.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,321.70 : 81,490.65 = 19,258.60 : x
  2. Step 2: Convert to fraction form
    54,321.70/81,490.65 = 19,258.60/x
  3. Step 3: Cross multiply
    54,321.70x = 81,490.65 × 19,258.60
  4. Step 4: Simplify right side
    54,321.70x = 1,569,395,832.09
  5. Step 5: Solve for x
    x = 1,569,395,832.09/54,321.70
  6. Step 6: Final answer
    x = 28,890.77

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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.