Home / 128,299.01-177,013.75-89,535.80

Finding the Fourth Proportional to 128,299.01, 177,013.75 and 89,535.80

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Solution

The fourth proportional to 128,299.01, 177,013.75 and 89,535.80 is: 123,532.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,299.01 : 177,013.75 = 89,535.80 : x
  2. Step 2: Convert to fraction form
    128,299.01/177,013.75 = 89,535.80/x
  3. Step 3: Cross multiply
    128,299.01x = 177,013.75 × 89,535.80
  4. Step 4: Simplify right side
    128,299.01x = 15,849,067,717.25
  5. Step 5: Solve for x
    x = 15,849,067,717.25/128,299.01
  6. Step 6: Final answer
    x = 123,532.27

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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.