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Finding the Fourth Proportional to 128,179.70, 192,270.02 and 39,432.59

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Solution

The fourth proportional to 128,179.70, 192,270.02 and 39,432.59 is: 59,149.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,179.70 : 192,270.02 = 39,432.59 : x
  2. Step 2: Convert to fraction form
    128,179.70/192,270.02 = 39,432.59/x
  3. Step 3: Cross multiply
    128,179.70x = 192,270.02 × 39,432.59
  4. Step 4: Simplify right side
    128,179.70x = 7,581,704,867.95
  5. Step 5: Solve for x
    x = 7,581,704,867.95/128,179.70
  6. Step 6: Final answer
    x = 59,149.03

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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.