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Finding the Fourth Proportional to 143,285.80, 214,928.70 and 128,523.55

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Solution

The fourth proportional to 143,285.80, 214,928.70 and 128,523.55 is: 192,785.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,285.80 : 214,928.70 = 128,523.55 : x
  2. Step 2: Convert to fraction form
    143,285.80/214,928.70 = 128,523.55/x
  3. Step 3: Cross multiply
    143,285.80x = 214,928.70 × 128,523.55
  4. Step 4: Simplify right side
    143,285.80x = 27,623,399,520.89
  5. Step 5: Solve for x
    x = 27,623,399,520.89/143,285.80
  6. Step 6: Final answer
    x = 192,785.33

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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.