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Finding the Fourth Proportional to 54,323.20, 81,436.20 and 21,032.20

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Solution

The fourth proportional to 54,323.20, 81,436.20 and 21,032.20 is: 31,529.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,323.20 : 81,436.20 = 21,032.20 : x
  2. Step 2: Convert to fraction form
    54,323.20/81,436.20 = 21,032.20/x
  3. Step 3: Cross multiply
    54,323.20x = 81,436.20 × 21,032.20
  4. Step 4: Simplify right side
    54,323.20x = 1,712,782,445.64
  5. Step 5: Solve for x
    x = 1,712,782,445.64/54,323.20
  6. Step 6: Final answer
    x = 31,529.48

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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.