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Finding the Fourth Proportional to 54,278.80, 81,399 and 25,812.40

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Solution

The fourth proportional to 54,278.80, 81,399 and 25,812.40 is: 38,709.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,278.80 : 81,399 = 25,812.40 : x
  2. Step 2: Convert to fraction form
    54,278.80/81,399 = 25,812.40/x
  3. Step 3: Cross multiply
    54,278.80x = 81,399 × 25,812.40
  4. Step 4: Simplify right side
    54,278.80x = 2,101,103,547.60
  5. Step 5: Solve for x
    x = 2,101,103,547.60/54,278.80
  6. Step 6: Final answer
    x = 38,709.47

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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.