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Finding the Fourth Proportional to 136,857, 206,379.90 and 134,985.72

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Solution

The fourth proportional to 136,857, 206,379.90 and 134,985.72 is: 203,558.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,857 : 206,379.90 = 134,985.72 : x
  2. Step 2: Convert to fraction form
    136,857/206,379.90 = 134,985.72/x
  3. Step 3: Cross multiply
    136,857x = 206,379.90 × 134,985.72
  4. Step 4: Simplify right side
    136,857x = 27,858,339,395.03
  5. Step 5: Solve for x
    x = 27,858,339,395.03/136,857
  6. Step 6: Final answer
    x = 203,558.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.