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Finding the Fourth Proportional to 170,760.60, 256,213.80 and 81,968.40

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Solution

The fourth proportional to 170,760.60, 256,213.80 and 81,968.40 is: 122,987.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,760.60 : 256,213.80 = 81,968.40 : x
  2. Step 2: Convert to fraction form
    170,760.60/256,213.80 = 81,968.40/x
  3. Step 3: Cross multiply
    170,760.60x = 256,213.80 × 81,968.40
  4. Step 4: Simplify right side
    170,760.60x = 21,001,435,243.92
  5. Step 5: Solve for x
    x = 21,001,435,243.92/170,760.60
  6. Step 6: Final answer
    x = 122,987.59

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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.