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Finding the Fourth Proportional to 172,638.30, 258,520.05 and 137,646.30

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Solution

The fourth proportional to 172,638.30, 258,520.05 and 137,646.30 is: 206,120.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,638.30 : 258,520.05 = 137,646.30 : x
  2. Step 2: Convert to fraction form
    172,638.30/258,520.05 = 137,646.30/x
  3. Step 3: Cross multiply
    172,638.30x = 258,520.05 × 137,646.30
  4. Step 4: Simplify right side
    172,638.30x = 35,584,328,358.32
  5. Step 5: Solve for x
    x = 35,584,328,358.32/172,638.30
  6. Step 6: Final answer
    x = 206,120.71

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1.5x scale

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.