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Finding the Fourth Proportional to 109,907.70, 164,861.55 and 80,383.20

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Solution

The fourth proportional to 109,907.70, 164,861.55 and 80,383.20 is: 120,574.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,907.70 : 164,861.55 = 80,383.20 : x
  2. Step 2: Convert to fraction form
    109,907.70/164,861.55 = 80,383.20/x
  3. Step 3: Cross multiply
    109,907.70x = 164,861.55 × 80,383.20
  4. Step 4: Simplify right side
    109,907.70x = 13,252,098,945.96
  5. Step 5: Solve for x
    x = 13,252,098,945.96/109,907.70
  6. Step 6: Final answer
    x = 120,574.80

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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.