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Finding the Fourth Proportional to 171,495.60, 257,135.40 and 71,725.20

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Solution

The fourth proportional to 171,495.60, 257,135.40 and 71,725.20 is: 107,542.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,495.60 : 257,135.40 = 71,725.20 : x
  2. Step 2: Convert to fraction form
    171,495.60/257,135.40 = 71,725.20/x
  3. Step 3: Cross multiply
    171,495.60x = 257,135.40 × 71,725.20
  4. Step 4: Simplify right side
    171,495.60x = 18,443,087,992.08
  5. Step 5: Solve for x
    x = 18,443,087,992.08/171,495.60
  6. Step 6: Final answer
    x = 107,542.63

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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.