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Finding the Fourth Proportional to 168,923.90, 253,240.05 and 85,817.90

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Solution

The fourth proportional to 168,923.90, 253,240.05 and 85,817.90 is: 128,652.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,923.90 : 253,240.05 = 85,817.90 : x
  2. Step 2: Convert to fraction form
    168,923.90/253,240.05 = 85,817.90/x
  3. Step 3: Cross multiply
    168,923.90x = 253,240.05 × 85,817.90
  4. Step 4: Simplify right side
    168,923.90x = 21,732,529,286.90
  5. Step 5: Solve for x
    x = 21,732,529,286.90/168,923.90
  6. Step 6: Final answer
    x = 128,652.78

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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.