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Finding the Fourth Proportional to 171,441.60, 257,308.20 and 76,817.40

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Solution

The fourth proportional to 171,441.60, 257,308.20 and 76,817.40 is: 115,291.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,441.60 : 257,308.20 = 76,817.40 : x
  2. Step 2: Convert to fraction form
    171,441.60/257,308.20 = 76,817.40/x
  3. Step 3: Cross multiply
    171,441.60x = 257,308.20 × 76,817.40
  4. Step 4: Simplify right side
    171,441.60x = 19,765,746,922.68
  5. Step 5: Solve for x
    x = 19,765,746,922.68/171,441.60
  6. Step 6: Final answer
    x = 115,291.43

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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.