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Finding the Fourth Proportional to 128,084.70, 192,127.05 and 83,847.90

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Solution

The fourth proportional to 128,084.70, 192,127.05 and 83,847.90 is: 125,771.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,084.70 : 192,127.05 = 83,847.90 : x
  2. Step 2: Convert to fraction form
    128,084.70/192,127.05 = 83,847.90/x
  3. Step 3: Cross multiply
    128,084.70x = 192,127.05 × 83,847.90
  4. Step 4: Simplify right side
    128,084.70x = 16,109,449,675.70
  5. Step 5: Solve for x
    x = 16,109,449,675.70/128,084.70
  6. Step 6: Final answer
    x = 125,771.85

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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.