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Finding the Fourth Proportional to 54,496.30, 81,683.70 and 21,205.30

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Solution

The fourth proportional to 54,496.30, 81,683.70 and 21,205.30 is: 31,784.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,496.30 : 81,683.70 = 21,205.30 : x
  2. Step 2: Convert to fraction form
    54,496.30/81,683.70 = 21,205.30/x
  3. Step 3: Cross multiply
    54,496.30x = 81,683.70 × 21,205.30
  4. Step 4: Simplify right side
    54,496.30x = 1,732,127,363.61
  5. Step 5: Solve for x
    x = 1,732,127,363.61/54,496.30
  6. Step 6: Final answer
    x = 31,784.31

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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.