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Finding the Fourth Proportional to 128,624.01, 192,018.39 and 120,076.30

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Solution

The fourth proportional to 128,624.01, 192,018.39 and 120,076.30 is: 179,257.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,624.01 : 192,018.39 = 120,076.30 : x
  2. Step 2: Convert to fraction form
    128,624.01/192,018.39 = 120,076.30/x
  3. Step 3: Cross multiply
    128,624.01x = 192,018.39 × 120,076.30
  4. Step 4: Simplify right side
    128,624.01x = 23,056,859,146.09
  5. Step 5: Solve for x
    x = 23,056,859,146.09/128,624.01
  6. Step 6: Final answer
    x = 179,257.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.