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Finding the Fourth Proportional to 54,385.20, 81,592.20 and 19,321.20

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Solution

The fourth proportional to 54,385.20, 81,592.20 and 19,321.20 is: 28,986.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,385.20 : 81,592.20 = 19,321.20 : x
  2. Step 2: Convert to fraction form
    54,385.20/81,592.20 = 19,321.20/x
  3. Step 3: Cross multiply
    54,385.20x = 81,592.20 × 19,321.20
  4. Step 4: Simplify right side
    54,385.20x = 1,576,459,214.64
  5. Step 5: Solve for x
    x = 1,576,459,214.64/54,385.20
  6. Step 6: Final answer
    x = 28,986.92

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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.