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Finding the Fourth Proportional to 79,139.78, 118,721.43 and 22,980.38

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Solution

The fourth proportional to 79,139.78, 118,721.43 and 22,980.38 is: 34,473.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,139.78 : 118,721.43 = 22,980.38 : x
  2. Step 2: Convert to fraction form
    79,139.78/118,721.43 = 22,980.38/x
  3. Step 3: Cross multiply
    79,139.78x = 118,721.43 × 22,980.38
  4. Step 4: Simplify right side
    79,139.78x = 2,728,263,575.54
  5. Step 5: Solve for x
    x = 2,728,263,575.54/79,139.78
  6. Step 6: Final answer
    x = 34,473.98

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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.