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Finding the Fourth Proportional to 171,028.80, 256,154.40 and 87,825.60

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Solution

The fourth proportional to 171,028.80, 256,154.40 and 87,825.60 is: 131,538.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,028.80 : 256,154.40 = 87,825.60 : x
  2. Step 2: Convert to fraction form
    171,028.80/256,154.40 = 87,825.60/x
  3. Step 3: Cross multiply
    171,028.80x = 256,154.40 × 87,825.60
  4. Step 4: Simplify right side
    171,028.80x = 22,496,913,872.64
  5. Step 5: Solve for x
    x = 22,496,913,872.64/171,028.80
  6. Step 6: Final answer
    x = 131,538.75

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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.