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Finding the Fourth Proportional to 217,877.79, 300,687.48 and 122,390.13

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Solution

The fourth proportional to 217,877.79, 300,687.48 and 122,390.13 is: 168,907.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,877.79 : 300,687.48 = 122,390.13 : x
  2. Step 2: Convert to fraction form
    217,877.79/300,687.48 = 122,390.13/x
  3. Step 3: Cross multiply
    217,877.79x = 300,687.48 × 122,390.13
  4. Step 4: Simplify right side
    217,877.79x = 36,801,179,766.57
  5. Step 5: Solve for x
    x = 36,801,179,766.57/217,877.79
  6. Step 6: Final answer
    x = 168,907.44

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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.