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Finding the Fourth Proportional to 79,172.68, 118,748.04 and 20,004.72

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Solution

The fourth proportional to 79,172.68, 118,748.04 and 20,004.72 is: 30,004.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,172.68 : 118,748.04 = 20,004.72 : x
  2. Step 2: Convert to fraction form
    79,172.68/118,748.04 = 20,004.72/x
  3. Step 3: Cross multiply
    79,172.68x = 118,748.04 × 20,004.72
  4. Step 4: Simplify right side
    79,172.68x = 2,375,521,290.75
  5. Step 5: Solve for x
    x = 2,375,521,290.75/79,172.68
  6. Step 6: Final answer
    x = 30,004.31

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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.