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Finding the Fourth Proportional to 172,121.80, 258,053.10 and 72,200.20

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Solution

The fourth proportional to 172,121.80, 258,053.10 and 72,200.20 is: 108,245.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,121.80 : 258,053.10 = 72,200.20 : x
  2. Step 2: Convert to fraction form
    172,121.80/258,053.10 = 72,200.20/x
  3. Step 3: Cross multiply
    172,121.80x = 258,053.10 × 72,200.20
  4. Step 4: Simplify right side
    172,121.80x = 18,631,485,430.62
  5. Step 5: Solve for x
    x = 18,631,485,430.62/172,121.80
  6. Step 6: Final answer
    x = 108,245.94

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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.