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Finding the Fourth Proportional to 122,259.38, 168,660.53 and 86,469.12

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Solution

The fourth proportional to 122,259.38, 168,660.53 and 86,469.12 is: 119,286.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,259.38 : 168,660.53 = 86,469.12 : x
  2. Step 2: Convert to fraction form
    122,259.38/168,660.53 = 86,469.12/x
  3. Step 3: Cross multiply
    122,259.38x = 168,660.53 × 86,469.12
  4. Step 4: Simplify right side
    122,259.38x = 14,583,927,499.75
  5. Step 5: Solve for x
    x = 14,583,927,499.75/122,259.38
  6. Step 6: Final answer
    x = 119,286.78

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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.