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Finding the Fourth Proportional to 231,999.80, 347,999.70 and 121,177.40

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Solution

The fourth proportional to 231,999.80, 347,999.70 and 121,177.40 is: 181,766.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,999.80 : 347,999.70 = 121,177.40 : x
  2. Step 2: Convert to fraction form
    231,999.80/347,999.70 = 121,177.40/x
  3. Step 3: Cross multiply
    231,999.80x = 347,999.70 × 121,177.40
  4. Step 4: Simplify right side
    231,999.80x = 42,169,698,846.78
  5. Step 5: Solve for x
    x = 42,169,698,846.78/231,999.80
  6. Step 6: Final answer
    x = 181,766.10

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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.