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Finding the Fourth Proportional to 128,571.64, 192,870.14 and 44,320.71

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Solution

The fourth proportional to 128,571.64, 192,870.14 and 44,320.71 is: 66,485.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,571.64 : 192,870.14 = 44,320.71 : x
  2. Step 2: Convert to fraction form
    128,571.64/192,870.14 = 44,320.71/x
  3. Step 3: Cross multiply
    128,571.64x = 192,870.14 × 44,320.71
  4. Step 4: Simplify right side
    128,571.64x = 8,548,141,542.60
  5. Step 5: Solve for x
    x = 8,548,141,542.60/128,571.64
  6. Step 6: Final answer
    x = 66,485.44

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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.