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Finding the Fourth Proportional to 172,105.20, 258,182.10 and 53,764.20

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Solution

The fourth proportional to 172,105.20, 258,182.10 and 53,764.20 is: 80,653.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,105.20 : 258,182.10 = 53,764.20 : x
  2. Step 2: Convert to fraction form
    172,105.20/258,182.10 = 53,764.20/x
  3. Step 3: Cross multiply
    172,105.20x = 258,182.10 × 53,764.20
  4. Step 4: Simplify right side
    172,105.20x = 13,880,954,060.82
  5. Step 5: Solve for x
    x = 13,880,954,060.82/172,105.20
  6. Step 6: Final answer
    x = 80,653.89

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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.