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Finding the Fourth Proportional to 172,012.94, 257,626.57 and 82,118.88

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Solution

The fourth proportional to 172,012.94, 257,626.57 and 82,118.88 is: 122,990.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,012.94 : 257,626.57 = 82,118.88 : x
  2. Step 2: Convert to fraction form
    172,012.94/257,626.57 = 82,118.88/x
  3. Step 3: Cross multiply
    172,012.94x = 257,626.57 × 82,118.88
  4. Step 4: Simplify right side
    172,012.94x = 21,156,005,386.64
  5. Step 5: Solve for x
    x = 21,156,005,386.64/172,012.94
  6. Step 6: Final answer
    x = 122,990.78

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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.