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Finding the Fourth Proportional to 54,322.80, 81,484.20 and 19,257.90

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Solution

The fourth proportional to 54,322.80, 81,484.20 and 19,257.90 is: 28,886.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,322.80 : 81,484.20 = 19,257.90 : x
  2. Step 2: Convert to fraction form
    54,322.80/81,484.20 = 19,257.90/x
  3. Step 3: Cross multiply
    54,322.80x = 81,484.20 × 19,257.90
  4. Step 4: Simplify right side
    54,322.80x = 1,569,214,575.18
  5. Step 5: Solve for x
    x = 1,569,214,575.18/54,322.80
  6. Step 6: Final answer
    x = 28,886.85

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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.