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Finding the Fourth Proportional to 181,810.80, 272,716.20 and 128,666.70

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Solution

The fourth proportional to 181,810.80, 272,716.20 and 128,666.70 is: 193,000.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,810.80 : 272,716.20 = 128,666.70 : x
  2. Step 2: Convert to fraction form
    181,810.80/272,716.20 = 128,666.70/x
  3. Step 3: Cross multiply
    181,810.80x = 272,716.20 × 128,666.70
  4. Step 4: Simplify right side
    181,810.80x = 35,089,493,490.54
  5. Step 5: Solve for x
    x = 35,089,493,490.54/181,810.80
  6. Step 6: Final answer
    x = 193,000.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.