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Finding the Fourth Proportional to 255,857.76, 353,085.30 and 142,687.80

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Solution

The fourth proportional to 255,857.76, 353,085.30 and 142,687.80 is: 196,910.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,857.76 : 353,085.30 = 142,687.80 : x
  2. Step 2: Convert to fraction form
    255,857.76/353,085.30 = 142,687.80/x
  3. Step 3: Cross multiply
    255,857.76x = 353,085.30 × 142,687.80
  4. Step 4: Simplify right side
    255,857.76x = 50,380,964,669.34
  5. Step 5: Solve for x
    x = 50,380,964,669.34/255,857.76
  6. Step 6: Final answer
    x = 196,910.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.