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Finding the Fourth Proportional to 171,666.60, 257,672.70 and 82,991.40

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Solution

The fourth proportional to 171,666.60, 257,672.70 and 82,991.40 is: 124,570.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,666.60 : 257,672.70 = 82,991.40 : x
  2. Step 2: Convert to fraction form
    171,666.60/257,672.70 = 82,991.40/x
  3. Step 3: Cross multiply
    171,666.60x = 257,672.70 × 82,991.40
  4. Step 4: Simplify right side
    171,666.60x = 21,384,618,114.78
  5. Step 5: Solve for x
    x = 21,384,618,114.78/171,666.60
  6. Step 6: Final answer
    x = 124,570.64

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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.