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Finding the Fourth Proportional to 171,455.70, 257,014.13 and 81,340.21

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Solution

The fourth proportional to 171,455.70, 257,014.13 and 81,340.21 is: 121,929.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,455.70 : 257,014.13 = 81,340.21 : x
  2. Step 2: Convert to fraction form
    171,455.70/257,014.13 = 81,340.21/x
  3. Step 3: Cross multiply
    171,455.70x = 257,014.13 × 81,340.21
  4. Step 4: Simplify right side
    171,455.70x = 20,905,583,221.73
  5. Step 5: Solve for x
    x = 20,905,583,221.73/171,455.70
  6. Step 6: Final answer
    x = 121,929.94

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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.