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Finding the Fourth Proportional to 217,078.80, 325,666.80 and 83,947.20

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Solution

The fourth proportional to 217,078.80, 325,666.80 and 83,947.20 is: 125,939.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,078.80 : 325,666.80 = 83,947.20 : x
  2. Step 2: Convert to fraction form
    217,078.80/325,666.80 = 83,947.20/x
  3. Step 3: Cross multiply
    217,078.80x = 325,666.80 × 83,947.20
  4. Step 4: Simplify right side
    217,078.80x = 27,338,815,992.96
  5. Step 5: Solve for x
    x = 27,338,815,992.96/217,078.80
  6. Step 6: Final answer
    x = 125,939.59

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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.