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Finding the Fourth Proportional to 204,818.80, 307,228.20 and 86,623.60

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Solution

The fourth proportional to 204,818.80, 307,228.20 and 86,623.60 is: 129,935.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,818.80 : 307,228.20 = 86,623.60 : x
  2. Step 2: Convert to fraction form
    204,818.80/307,228.20 = 86,623.60/x
  3. Step 3: Cross multiply
    204,818.80x = 307,228.20 × 86,623.60
  4. Step 4: Simplify right side
    204,818.80x = 26,613,212,705.52
  5. Step 5: Solve for x
    x = 26,613,212,705.52/204,818.80
  6. Step 6: Final answer
    x = 129,935.40

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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.