Home / 128,240.06-176,992.81-86,828.27

Finding the Fourth Proportional to 128,240.06, 176,992.81 and 86,828.27

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Solution

The fourth proportional to 128,240.06, 176,992.81 and 86,828.27 is: 119,837.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,240.06 : 176,992.81 = 86,828.27 : x
  2. Step 2: Convert to fraction form
    128,240.06/176,992.81 = 86,828.27/x
  3. Step 3: Cross multiply
    128,240.06x = 176,992.81 × 86,828.27
  4. Step 4: Simplify right side
    128,240.06x = 15,367,979,494.74
  5. Step 5: Solve for x
    x = 15,367,979,494.74/128,240.06
  6. Step 6: Final answer
    x = 119,837.59

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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.