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Finding the Fourth Proportional to 54,308.70, 81,412.02 and 28,006.38

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Solution

The fourth proportional to 54,308.70, 81,412.02 and 28,006.38 is: 41,983.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,308.70 : 81,412.02 = 28,006.38 : x
  2. Step 2: Convert to fraction form
    54,308.70/81,412.02 = 28,006.38/x
  3. Step 3: Cross multiply
    54,308.70x = 81,412.02 × 28,006.38
  4. Step 4: Simplify right side
    54,308.70x = 2,280,055,968.69
  5. Step 5: Solve for x
    x = 2,280,055,968.69/54,308.70
  6. Step 6: Final answer
    x = 41,983.25

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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.