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Finding the Fourth Proportional to 128,529.60, 192,736.80 and 58,372.80

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Solution

The fourth proportional to 128,529.60, 192,736.80 and 58,372.80 is: 87,533.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,529.60 : 192,736.80 = 58,372.80 : x
  2. Step 2: Convert to fraction form
    128,529.60/192,736.80 = 58,372.80/x
  3. Step 3: Cross multiply
    128,529.60x = 192,736.80 × 58,372.80
  4. Step 4: Simplify right side
    128,529.60x = 11,250,586,679.04
  5. Step 5: Solve for x
    x = 11,250,586,679.04/128,529.60
  6. Step 6: Final answer
    x = 87,533.04

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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.