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Finding the Fourth Proportional to 171,318.80, 256,978.20 and 115,331.60

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Solution

The fourth proportional to 171,318.80, 256,978.20 and 115,331.60 is: 172,997.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,318.80 : 256,978.20 = 115,331.60 : x
  2. Step 2: Convert to fraction form
    171,318.80/256,978.20 = 115,331.60/x
  3. Step 3: Cross multiply
    171,318.80x = 256,978.20 × 115,331.60
  4. Step 4: Simplify right side
    171,318.80x = 29,637,706,971.12
  5. Step 5: Solve for x
    x = 29,637,706,971.12/171,318.80
  6. Step 6: Final answer
    x = 172,997.40

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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.