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Finding the Fourth Proportional to 127,647.60, 176,039.01 and 79,905.30

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Solution

The fourth proportional to 127,647.60, 176,039.01 and 79,905.30 is: 110,197.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,647.60 : 176,039.01 = 79,905.30 : x
  2. Step 2: Convert to fraction form
    127,647.60/176,039.01 = 79,905.30/x
  3. Step 3: Cross multiply
    127,647.60x = 176,039.01 × 79,905.30
  4. Step 4: Simplify right side
    127,647.60x = 14,066,449,905.75
  5. Step 5: Solve for x
    x = 14,066,449,905.75/127,647.60
  6. Step 6: Final answer
    x = 110,197.53

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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.