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Finding the Fourth Proportional to 40,072.80, 60,109.20 and 16,696.20

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Solution

The fourth proportional to 40,072.80, 60,109.20 and 16,696.20 is: 25,044.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,072.80 : 60,109.20 = 16,696.20 : x
  2. Step 2: Convert to fraction form
    40,072.80/60,109.20 = 16,696.20/x
  3. Step 3: Cross multiply
    40,072.80x = 60,109.20 × 16,696.20
  4. Step 4: Simplify right side
    40,072.80x = 1,003,595,225.04
  5. Step 5: Solve for x
    x = 1,003,595,225.04/40,072.80
  6. Step 6: Final answer
    x = 25,044.30

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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.