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Finding the Fourth Proportional to 217,654.80, 300,381.72 and 122,180.40

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Solution

The fourth proportional to 217,654.80, 300,381.72 and 122,180.40 is: 168,619.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,654.80 : 300,381.72 = 122,180.40 : x
  2. Step 2: Convert to fraction form
    217,654.80/300,381.72 = 122,180.40/x
  3. Step 3: Cross multiply
    217,654.80x = 300,381.72 × 122,180.40
  4. Step 4: Simplify right side
    217,654.80x = 36,700,758,702.29
  5. Step 5: Solve for x
    x = 36,700,758,702.29/217,654.80
  6. Step 6: Final answer
    x = 168,619.11

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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.