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Finding the Fourth Proportional to 170,771.10, 256,229.55 and 81,978.90

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Solution

The fourth proportional to 170,771.10, 256,229.55 and 81,978.90 is: 123,003.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,771.10 : 256,229.55 = 81,978.90 : x
  2. Step 2: Convert to fraction form
    170,771.10/256,229.55 = 81,978.90/x
  3. Step 3: Cross multiply
    170,771.10x = 256,229.55 × 81,978.90
  4. Step 4: Simplify right side
    170,771.10x = 21,005,416,656.50
  5. Step 5: Solve for x
    x = 21,005,416,656.50/170,771.10
  6. Step 6: Final answer
    x = 123,003.35

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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.