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Finding the Fourth Proportional to 143,295.80, 214,943.70 and 128,533.55

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Solution

The fourth proportional to 143,295.80, 214,943.70 and 128,533.55 is: 192,800.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,295.80 : 214,943.70 = 128,533.55 : x
  2. Step 2: Convert to fraction form
    143,295.80/214,943.70 = 128,533.55/x
  3. Step 3: Cross multiply
    143,295.80x = 214,943.70 × 128,533.55
  4. Step 4: Simplify right side
    143,295.80x = 27,627,476,811.14
  5. Step 5: Solve for x
    x = 27,627,476,811.14/143,295.80
  6. Step 6: Final answer
    x = 192,800.33

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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.