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Finding the Fourth Proportional to 217,645.82, 300,366.09 and 120,854.66

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Solution

The fourth proportional to 217,645.82, 300,366.09 and 120,854.66 is: 166,787.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,645.82 : 300,366.09 = 120,854.66 : x
  2. Step 2: Convert to fraction form
    217,645.82/300,366.09 = 120,854.66/x
  3. Step 3: Cross multiply
    217,645.82x = 300,366.09 × 120,854.66
  4. Step 4: Simplify right side
    217,645.82x = 36,300,641,682.48
  5. Step 5: Solve for x
    x = 36,300,641,682.48/217,645.82
  6. Step 6: Final answer
    x = 166,787.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.