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Finding the Fourth Proportional to 170,858.70, 256,288.05 and 82,090.80

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Solution

The fourth proportional to 170,858.70, 256,288.05 and 82,090.80 is: 123,136.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,858.70 : 256,288.05 = 82,090.80 : x
  2. Step 2: Convert to fraction form
    170,858.70/256,288.05 = 82,090.80/x
  3. Step 3: Cross multiply
    170,858.70x = 256,288.05 × 82,090.80
  4. Step 4: Simplify right side
    170,858.70x = 21,038,891,054.94
  5. Step 5: Solve for x
    x = 21,038,891,054.94/170,858.70
  6. Step 6: Final answer
    x = 123,136.20

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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.