Home / 128,761.40-192,358.88-83,413.61

Finding the Fourth Proportional to 128,761.40, 192,358.88 and 83,413.61

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Solution

The fourth proportional to 128,761.40, 192,358.88 and 83,413.61 is: 124,613.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,761.40 : 192,358.88 = 83,413.61 : x
  2. Step 2: Convert to fraction form
    128,761.40/192,358.88 = 83,413.61/x
  3. Step 3: Cross multiply
    128,761.40x = 192,358.88 × 83,413.61
  4. Step 4: Simplify right side
    128,761.40x = 16,045,348,660.19
  5. Step 5: Solve for x
    x = 16,045,348,660.19/128,761.40
  6. Step 6: Final answer
    x = 124,613.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.