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Finding the Fourth Proportional to 102,796.20, 154,079.10 and 43,621.80

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Solution

The fourth proportional to 102,796.20, 154,079.10 and 43,621.80 is: 65,383.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,796.20 : 154,079.10 = 43,621.80 : x
  2. Step 2: Convert to fraction form
    102,796.20/154,079.10 = 43,621.80/x
  3. Step 3: Cross multiply
    102,796.20x = 154,079.10 × 43,621.80
  4. Step 4: Simplify right side
    102,796.20x = 6,721,207,684.38
  5. Step 5: Solve for x
    x = 6,721,207,684.38/102,796.20
  6. Step 6: Final answer
    x = 65,383.81

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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.