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Finding the Fourth Proportional to 170,763.10, 256,217.55 and 81,970.90

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Solution

The fourth proportional to 170,763.10, 256,217.55 and 81,970.90 is: 122,991.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,763.10 : 256,217.55 = 81,970.90 : x
  2. Step 2: Convert to fraction form
    170,763.10/256,217.55 = 81,970.90/x
  3. Step 3: Cross multiply
    170,763.10x = 256,217.55 × 81,970.90
  4. Step 4: Simplify right side
    170,763.10x = 21,002,383,169.30
  5. Step 5: Solve for x
    x = 21,002,383,169.30/170,763.10
  6. Step 6: Final answer
    x = 122,991.34

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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.