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Finding the Fourth Proportional to 204,693.30, 306,930.60 and 86,230.80

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Solution

The fourth proportional to 204,693.30, 306,930.60 and 86,230.80 is: 129,300.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,693.30 : 306,930.60 = 86,230.80 : x
  2. Step 2: Convert to fraction form
    204,693.30/306,930.60 = 86,230.80/x
  3. Step 3: Cross multiply
    204,693.30x = 306,930.60 × 86,230.80
  4. Step 4: Simplify right side
    204,693.30x = 26,466,871,182.48
  5. Step 5: Solve for x
    x = 26,466,871,182.48/204,693.30
  6. Step 6: Final answer
    x = 129,300.13

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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.