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Finding the Fourth Proportional to 128,529.83, 192,828.01 and 75,266.82

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Solution

The fourth proportional to 128,529.83, 192,828.01 and 75,266.82 is: 112,919.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,529.83 : 192,828.01 = 75,266.82 : x
  2. Step 2: Convert to fraction form
    128,529.83/192,828.01 = 75,266.82/x
  3. Step 3: Cross multiply
    128,529.83x = 192,828.01 × 75,266.82
  4. Step 4: Simplify right side
    128,529.83x = 14,513,551,119.63
  5. Step 5: Solve for x
    x = 14,513,551,119.63/128,529.83
  6. Step 6: Final answer
    x = 112,919.71

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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.