Home / 128,239.06-176,991.43-86,827.27

Finding the Fourth Proportional to 128,239.06, 176,991.43 and 86,827.27

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Solution

The fourth proportional to 128,239.06, 176,991.43 and 86,827.27 is: 119,836.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,239.06 : 176,991.43 = 86,827.27 : x
  2. Step 2: Convert to fraction form
    128,239.06/176,991.43 = 86,827.27/x
  3. Step 3: Cross multiply
    128,239.06x = 176,991.43 × 86,827.27
  4. Step 4: Simplify right side
    128,239.06x = 15,367,682,515.41
  5. Step 5: Solve for x
    x = 15,367,682,515.41/128,239.06
  6. Step 6: Final answer
    x = 119,836.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.