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Finding the Fourth Proportional to 128,661.89, 192,927.02 and 53,761.59

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Solution

The fourth proportional to 128,661.89, 192,927.02 and 53,761.59 is: 80,614.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,661.89 : 192,927.02 = 53,761.59 : x
  2. Step 2: Convert to fraction form
    128,661.89/192,927.02 = 53,761.59/x
  3. Step 3: Cross multiply
    128,661.89x = 192,927.02 × 53,761.59
  4. Step 4: Simplify right side
    128,661.89x = 10,372,063,080.35
  5. Step 5: Solve for x
    x = 10,372,063,080.35/128,661.89
  6. Step 6: Final answer
    x = 80,614.89

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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.