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Finding the Fourth Proportional to 215,927.97, 297,981 and 120,440.85

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Solution

The fourth proportional to 215,927.97, 297,981 and 120,440.85 is: 166,208.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,927.97 : 297,981 = 120,440.85 : x
  2. Step 2: Convert to fraction form
    215,927.97/297,981 = 120,440.85/x
  3. Step 3: Cross multiply
    215,927.97x = 297,981 × 120,440.85
  4. Step 4: Simplify right side
    215,927.97x = 35,889,084,923.85
  5. Step 5: Solve for x
    x = 35,889,084,923.85/215,927.97
  6. Step 6: Final answer
    x = 166,208.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.