Home / 192,780.88-266,190.60-128,312.08

Finding the Fourth Proportional to 192,780.88, 266,190.60 and 128,312.08

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Solution

The fourth proportional to 192,780.88, 266,190.60 and 128,312.08 is: 177,172.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,780.88 : 266,190.60 = 128,312.08 : x
  2. Step 2: Convert to fraction form
    192,780.88/266,190.60 = 128,312.08/x
  3. Step 3: Cross multiply
    192,780.88x = 266,190.60 × 128,312.08
  4. Step 4: Simplify right side
    192,780.88x = 34,155,469,562.45
  5. Step 5: Solve for x
    x = 34,155,469,562.45/192,780.88
  6. Step 6: Final answer
    x = 177,172.50

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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.