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Finding the Fourth Proportional to 171,669.70, 257,715.15 and 108,489.70

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Solution

The fourth proportional to 171,669.70, 257,715.15 and 108,489.70 is: 162,867.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,669.70 : 257,715.15 = 108,489.70 : x
  2. Step 2: Convert to fraction form
    171,669.70/257,715.15 = 108,489.70/x
  3. Step 3: Cross multiply
    171,669.70x = 257,715.15 × 108,489.70
  4. Step 4: Simplify right side
    171,669.70x = 27,959,439,308.96
  5. Step 5: Solve for x
    x = 27,959,439,308.96/171,669.70
  6. Step 6: Final answer
    x = 162,867.64

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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.