Home / 128,968.61-193,584.13-86,715.77

Finding the Fourth Proportional to 128,968.61, 193,584.13 and 86,715.77

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Solution

The fourth proportional to 128,968.61, 193,584.13 and 86,715.77 is: 130,161.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,968.61 : 193,584.13 = 86,715.77 : x
  2. Step 2: Convert to fraction form
    128,968.61/193,584.13 = 86,715.77/x
  3. Step 3: Cross multiply
    128,968.61x = 193,584.13 × 86,715.77
  4. Step 4: Simplify right side
    128,968.61x = 16,786,795,708.02
  5. Step 5: Solve for x
    x = 16,786,795,708.02/128,968.61
  6. Step 6: Final answer
    x = 130,161.88

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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.