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Finding the Fourth Proportional to 128,624.52, 192,982.14 and 39,900.36

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Solution

The fourth proportional to 128,624.52, 192,982.14 and 39,900.36 is: 59,864.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,624.52 : 192,982.14 = 39,900.36 : x
  2. Step 2: Convert to fraction form
    128,624.52/192,982.14 = 39,900.36/x
  3. Step 3: Cross multiply
    128,624.52x = 192,982.14 × 39,900.36
  4. Step 4: Simplify right side
    128,624.52x = 7,700,056,859.57
  5. Step 5: Solve for x
    x = 7,700,056,859.57/128,624.52
  6. Step 6: Final answer
    x = 59,864.61

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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.