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Finding the Fourth Proportional to 171,508.60, 257,408.70 and 76,884.40

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Solution

The fourth proportional to 171,508.60, 257,408.70 and 76,884.40 is: 115,391.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,508.60 : 257,408.70 = 76,884.40 : x
  2. Step 2: Convert to fraction form
    171,508.60/257,408.70 = 76,884.40/x
  3. Step 3: Cross multiply
    171,508.60x = 257,408.70 × 76,884.40
  4. Step 4: Simplify right side
    171,508.60x = 19,790,713,454.28
  5. Step 5: Solve for x
    x = 19,790,713,454.28/171,508.60
  6. Step 6: Final answer
    x = 115,391.96

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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.