Home / 128,836.52-193,309.86-66,550.76

Finding the Fourth Proportional to 128,836.52, 193,309.86 and 66,550.76

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Solution

The fourth proportional to 128,836.52, 193,309.86 and 66,550.76 is: 99,854.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,836.52 : 193,309.86 = 66,550.76 : x
  2. Step 2: Convert to fraction form
    128,836.52/193,309.86 = 66,550.76/x
  3. Step 3: Cross multiply
    128,836.52x = 193,309.86 × 66,550.76
  4. Step 4: Simplify right side
    128,836.52x = 12,864,917,131.94
  5. Step 5: Solve for x
    x = 12,864,917,131.94/128,836.52
  6. Step 6: Final answer
    x = 99,854.59

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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.