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Finding the Fourth Proportional to 39,155, 54,078.76 and 25,786

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Solution

The fourth proportional to 39,155, 54,078.76 and 25,786 is: 35,614.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,155 : 54,078.76 = 25,786 : x
  2. Step 2: Convert to fraction form
    39,155/54,078.76 = 25,786/x
  3. Step 3: Cross multiply
    39,155x = 54,078.76 × 25,786
  4. Step 4: Simplify right side
    39,155x = 1,394,474,905.36
  5. Step 5: Solve for x
    x = 1,394,474,905.36/39,155
  6. Step 6: Final answer
    x = 35,614.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.