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Finding the Fourth Proportional to 128,486.80, 192,758.52 and 38,525.92

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Solution

The fourth proportional to 128,486.80, 192,758.52 and 38,525.92 is: 57,797.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,486.80 : 192,758.52 = 38,525.92 : x
  2. Step 2: Convert to fraction form
    128,486.80/192,758.52 = 38,525.92/x
  3. Step 3: Cross multiply
    128,486.80x = 192,758.52 × 38,525.92
  4. Step 4: Simplify right side
    128,486.80x = 7,426,199,320.84
  5. Step 5: Solve for x
    x = 7,426,199,320.84/128,486.80
  6. Step 6: Final answer
    x = 57,797.37

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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.