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Finding the Fourth Proportional to 54,310.80, 81,406.80 and 19,232.40

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Solution

The fourth proportional to 54,310.80, 81,406.80 and 19,232.40 is: 28,827.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,310.80 : 81,406.80 = 19,232.40 : x
  2. Step 2: Convert to fraction form
    54,310.80/81,406.80 = 19,232.40/x
  3. Step 3: Cross multiply
    54,310.80x = 81,406.80 × 19,232.40
  4. Step 4: Simplify right side
    54,310.80x = 1,565,648,140.32
  5. Step 5: Solve for x
    x = 1,565,648,140.32/54,310.80
  6. Step 6: Final answer
    x = 28,827.57

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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.