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Finding the Fourth Proportional to 128,052.90, 192,237.30 and 80,667.90

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Solution

The fourth proportional to 128,052.90, 192,237.30 and 80,667.90 is: 121,101.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,052.90 : 192,237.30 = 80,667.90 : x
  2. Step 2: Convert to fraction form
    128,052.90/192,237.30 = 80,667.90/x
  3. Step 3: Cross multiply
    128,052.90x = 192,237.30 × 80,667.90
  4. Step 4: Simplify right side
    128,052.90x = 15,507,379,292.67
  5. Step 5: Solve for x
    x = 15,507,379,292.67/128,052.90
  6. Step 6: Final answer
    x = 121,101.35

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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.