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Finding the Fourth Proportional to 120,285.90, 166,012.11 and 69,288.71

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Solution

The fourth proportional to 120,285.90, 166,012.11 and 69,288.71 is: 95,628.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,285.90 : 166,012.11 = 69,288.71 : x
  2. Step 2: Convert to fraction form
    120,285.90/166,012.11 = 69,288.71/x
  3. Step 3: Cross multiply
    120,285.90x = 166,012.11 × 69,288.71
  4. Step 4: Simplify right side
    120,285.90x = 11,502,764,116.22
  5. Step 5: Solve for x
    x = 11,502,764,116.22/120,285.90
  6. Step 6: Final answer
    x = 95,628.53

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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.