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Finding the Fourth Proportional to 54,280.70, 81,425.10 and 19,215.80

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Solution

The fourth proportional to 54,280.70, 81,425.10 and 19,215.80 is: 28,825.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,280.70 : 81,425.10 = 19,215.80 : x
  2. Step 2: Convert to fraction form
    54,280.70/81,425.10 = 19,215.80/x
  3. Step 3: Cross multiply
    54,280.70x = 81,425.10 × 19,215.80
  4. Step 4: Simplify right side
    54,280.70x = 1,564,648,436.58
  5. Step 5: Solve for x
    x = 1,564,648,436.58/54,280.70
  6. Step 6: Final answer
    x = 28,825.13

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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.