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Finding the Fourth Proportional to 128,474.52, 192,712.99 and 57,400.73

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Solution

The fourth proportional to 128,474.52, 192,712.99 and 57,400.73 is: 86,101.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,474.52 : 192,712.99 = 57,400.73 : x
  2. Step 2: Convert to fraction form
    128,474.52/192,712.99 = 57,400.73/x
  3. Step 3: Cross multiply
    128,474.52x = 192,712.99 × 57,400.73
  4. Step 4: Simplify right side
    128,474.52x = 11,061,866,306.48
  5. Step 5: Solve for x
    x = 11,061,866,306.48/128,474.52
  6. Step 6: Final answer
    x = 86,101.64

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1.5x scale

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.