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Finding the Fourth Proportional to 137,730.80, 206,304.60 and 122,956.40

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Solution

The fourth proportional to 137,730.80, 206,304.60 and 122,956.40 is: 184,174.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,730.80 : 206,304.60 = 122,956.40 : x
  2. Step 2: Convert to fraction form
    137,730.80/206,304.60 = 122,956.40/x
  3. Step 3: Cross multiply
    137,730.80x = 206,304.60 × 122,956.40
  4. Step 4: Simplify right side
    137,730.80x = 25,366,470,919.44
  5. Step 5: Solve for x
    x = 25,366,470,919.44/137,730.80
  6. Step 6: Final answer
    x = 184,174.28

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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.