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Finding the Fourth Proportional to 215,807.49, 297,811.08 and 120,311.73

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Solution

The fourth proportional to 215,807.49, 297,811.08 and 120,311.73 is: 166,028.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,807.49 : 297,811.08 = 120,311.73 : x
  2. Step 2: Convert to fraction form
    215,807.49/297,811.08 = 120,311.73/x
  3. Step 3: Cross multiply
    215,807.49x = 297,811.08 × 120,311.73
  4. Step 4: Simplify right side
    215,807.49x = 35,830,166,247.97
  5. Step 5: Solve for x
    x = 35,830,166,247.97/215,807.49
  6. Step 6: Final answer
    x = 166,028.37

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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.