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Finding the Fourth Proportional to 171,923.61, 257,857.12 and 45,571.71

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Solution

The fourth proportional to 171,923.61, 257,857.12 and 45,571.71 is: 68,350.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,923.61 : 257,857.12 = 45,571.71 : x
  2. Step 2: Convert to fraction form
    171,923.61/257,857.12 = 45,571.71/x
  3. Step 3: Cross multiply
    171,923.61x = 257,857.12 × 45,571.71
  4. Step 4: Simplify right side
    171,923.61x = 11,750,990,918.00
  5. Step 5: Solve for x
    x = 11,750,990,918.00/171,923.61
  6. Step 6: Final answer
    x = 68,350.07

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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.