Home / 128,909.27-193,369.16-61,406.61

Finding the Fourth Proportional to 128,909.27, 193,369.16 and 61,406.61

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Solution

The fourth proportional to 128,909.27, 193,369.16 and 61,406.61 is: 92,112.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,909.27 : 193,369.16 = 61,406.61 : x
  2. Step 2: Convert to fraction form
    128,909.27/193,369.16 = 61,406.61/x
  3. Step 3: Cross multiply
    128,909.27x = 193,369.16 × 61,406.61
  4. Step 4: Simplify right side
    128,909.27x = 11,874,144,287.11
  5. Step 5: Solve for x
    x = 11,874,144,287.11/128,909.27
  6. Step 6: Final answer
    x = 92,112.41

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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.