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Finding the Fourth Proportional to 172,480.10, 258,720.15 and 83,906.60

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Solution

The fourth proportional to 172,480.10, 258,720.15 and 83,906.60 is: 125,859.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,480.10 : 258,720.15 = 83,906.60 : x
  2. Step 2: Convert to fraction form
    172,480.10/258,720.15 = 83,906.60/x
  3. Step 3: Cross multiply
    172,480.10x = 258,720.15 × 83,906.60
  4. Step 4: Simplify right side
    172,480.10x = 21,708,328,137.99
  5. Step 5: Solve for x
    x = 21,708,328,137.99/172,480.10
  6. Step 6: Final answer
    x = 125,859.90

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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.