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Finding the Fourth Proportional to 79,173.78, 118,761.45 and 20,009.46

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Solution

The fourth proportional to 79,173.78, 118,761.45 and 20,009.46 is: 30,014.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,173.78 : 118,761.45 = 20,009.46 : x
  2. Step 2: Convert to fraction form
    79,173.78/118,761.45 = 20,009.46/x
  3. Step 3: Cross multiply
    79,173.78x = 118,761.45 × 20,009.46
  4. Step 4: Simplify right side
    79,173.78x = 2,376,352,483.32
  5. Step 5: Solve for x
    x = 2,376,352,483.32/79,173.78
  6. Step 6: Final answer
    x = 30,014.39

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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.