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Finding the Fourth Proportional to 128,099.43, 176,859.54 and 82,846.80

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Solution

The fourth proportional to 128,099.43, 176,859.54 and 82,846.80 is: 114,381.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,099.43 : 176,859.54 = 82,846.80 : x
  2. Step 2: Convert to fraction form
    128,099.43/176,859.54 = 82,846.80/x
  3. Step 3: Cross multiply
    128,099.43x = 176,859.54 × 82,846.80
  4. Step 4: Simplify right side
    128,099.43x = 14,652,246,938.47
  5. Step 5: Solve for x
    x = 14,652,246,938.47/128,099.43
  6. Step 6: Final answer
    x = 114,381.83

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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.