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Finding the Fourth Proportional to 128,866.96, 193,305.30 and 40,128.22

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Solution

The fourth proportional to 128,866.96, 193,305.30 and 40,128.22 is: 60,193.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,866.96 : 193,305.30 = 40,128.22 : x
  2. Step 2: Convert to fraction form
    128,866.96/193,305.30 = 40,128.22/x
  3. Step 3: Cross multiply
    128,866.96x = 193,305.30 × 40,128.22
  4. Step 4: Simplify right side
    128,866.96x = 7,756,997,605.57
  5. Step 5: Solve for x
    x = 7,756,997,605.57/128,866.96
  6. Step 6: Final answer
    x = 60,193.84

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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.