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Finding the Fourth Proportional to 120,358.45, 166,097.26 and 65,912.91

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Solution

The fourth proportional to 120,358.45, 166,097.26 and 65,912.91 is: 90,961.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,358.45 : 166,097.26 = 65,912.91 : x
  2. Step 2: Convert to fraction form
    120,358.45/166,097.26 = 65,912.91/x
  3. Step 3: Cross multiply
    120,358.45x = 166,097.26 × 65,912.91
  4. Step 4: Simplify right side
    120,358.45x = 10,947,953,749.63
  5. Step 5: Solve for x
    x = 10,947,953,749.63/120,358.45
  6. Step 6: Final answer
    x = 90,961.24

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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.