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Finding the Fourth Proportional to 171,866.20, 257,811.58 and 71,925.76

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Solution

The fourth proportional to 171,866.20, 257,811.58 and 71,925.76 is: 107,893.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,866.20 : 257,811.58 = 71,925.76 : x
  2. Step 2: Convert to fraction form
    171,866.20/257,811.58 = 71,925.76/x
  3. Step 3: Cross multiply
    171,866.20x = 257,811.58 × 71,925.76
  4. Step 4: Simplify right side
    171,866.20x = 18,543,293,828.30
  5. Step 5: Solve for x
    x = 18,543,293,828.30/171,866.20
  6. Step 6: Final answer
    x = 107,893.78

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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.