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Finding the Fourth Proportional to 128,568.52, 192,903.54 and 39,828.95

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Solution

The fourth proportional to 128,568.52, 192,903.54 and 39,828.95 is: 59,759.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,568.52 : 192,903.54 = 39,828.95 : x
  2. Step 2: Convert to fraction form
    128,568.52/192,903.54 = 39,828.95/x
  3. Step 3: Cross multiply
    128,568.52x = 192,903.54 × 39,828.95
  4. Step 4: Simplify right side
    128,568.52x = 7,683,145,449.48
  5. Step 5: Solve for x
    x = 7,683,145,449.48/128,568.52
  6. Step 6: Final answer
    x = 59,759.15

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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.