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Finding the Fourth Proportional to 205,974.80, 308,443.80 and 135,472.40

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Solution

The fourth proportional to 205,974.80, 308,443.80 and 135,472.40 is: 202,867.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,974.80 : 308,443.80 = 135,472.40 : x
  2. Step 2: Convert to fraction form
    205,974.80/308,443.80 = 135,472.40/x
  3. Step 3: Cross multiply
    205,974.80x = 308,443.80 × 135,472.40
  4. Step 4: Simplify right side
    205,974.80x = 41,785,621,851.12
  5. Step 5: Solve for x
    x = 41,785,621,851.12/205,974.80
  6. Step 6: Final answer
    x = 202,867.64

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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.