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Finding the Fourth Proportional to 54,671.94, 81,989.51 and 20,930.04

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Solution

The fourth proportional to 54,671.94, 81,989.51 and 20,930.04 is: 31,388.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,671.94 : 81,989.51 = 20,930.04 : x
  2. Step 2: Convert to fraction form
    54,671.94/81,989.51 = 20,930.04/x
  3. Step 3: Cross multiply
    54,671.94x = 81,989.51 × 20,930.04
  4. Step 4: Simplify right side
    54,671.94x = 1,716,043,619.23
  5. Step 5: Solve for x
    x = 1,716,043,619.23/54,671.94
  6. Step 6: Final answer
    x = 31,388.01

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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.