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Finding the Fourth Proportional to 79,218.30, 118,846.80 and 25,913.37

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Solution

The fourth proportional to 79,218.30, 118,846.80 and 25,913.37 is: 38,876.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,218.30 : 118,846.80 = 25,913.37 : x
  2. Step 2: Convert to fraction form
    79,218.30/118,846.80 = 25,913.37/x
  3. Step 3: Cross multiply
    79,218.30x = 118,846.80 × 25,913.37
  4. Step 4: Simplify right side
    79,218.30x = 3,079,721,101.72
  5. Step 5: Solve for x
    x = 3,079,721,101.72/79,218.30
  6. Step 6: Final answer
    x = 38,876.38

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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.