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Finding the Fourth Proportional to 204,823.80, 307,235.70 and 86,628.60

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Solution

The fourth proportional to 204,823.80, 307,235.70 and 86,628.60 is: 129,942.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,823.80 : 307,235.70 = 86,628.60 : x
  2. Step 2: Convert to fraction form
    204,823.80/307,235.70 = 86,628.60/x
  3. Step 3: Cross multiply
    204,823.80x = 307,235.70 × 86,628.60
  4. Step 4: Simplify right side
    204,823.80x = 26,615,398,561.02
  5. Step 5: Solve for x
    x = 26,615,398,561.02/204,823.80
  6. Step 6: Final answer
    x = 129,942.90

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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.