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Finding the Fourth Proportional to 120,356.38, 166,094.40 and 65,910.84

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Solution

The fourth proportional to 120,356.38, 166,094.40 and 65,910.84 is: 90,958.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,356.38 : 166,094.40 = 65,910.84 : x
  2. Step 2: Convert to fraction form
    120,356.38/166,094.40 = 65,910.84/x
  3. Step 3: Cross multiply
    120,356.38x = 166,094.40 × 65,910.84
  4. Step 4: Simplify right side
    120,356.38x = 10,947,421,423.30
  5. Step 5: Solve for x
    x = 10,947,421,423.30/120,356.38
  6. Step 6: Final answer
    x = 90,958.38

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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.