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Finding the Fourth Proportional to 200,354.40, 300,531.60 and 81,986.40

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Solution

The fourth proportional to 200,354.40, 300,531.60 and 81,986.40 is: 122,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,354.40 : 300,531.60 = 81,986.40 : x
  2. Step 2: Convert to fraction form
    200,354.40/300,531.60 = 81,986.40/x
  3. Step 3: Cross multiply
    200,354.40x = 300,531.60 × 81,986.40
  4. Step 4: Simplify right side
    200,354.40x = 24,639,503,970.24
  5. Step 5: Solve for x
    x = 24,639,503,970.24/200,354.40
  6. Step 6: Final answer
    x = 122,979.60

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1.5x scale

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.