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Finding the Fourth Proportional to 128,486.52, 192,769.22 and 57,468.91

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Solution

The fourth proportional to 128,486.52, 192,769.22 and 57,468.91 is: 86,221.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,486.52 : 192,769.22 = 57,468.91 : x
  2. Step 2: Convert to fraction form
    128,486.52/192,769.22 = 57,468.91/x
  3. Step 3: Cross multiply
    128,486.52x = 192,769.22 × 57,468.91
  4. Step 4: Simplify right side
    128,486.52x = 11,078,236,667.61
  5. Step 5: Solve for x
    x = 11,078,236,667.61/128,486.52
  6. Step 6: Final answer
    x = 86,221.00

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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.