Home / 85,332.80-127,999.20-54,190.40

Finding the Fourth Proportional to 85,332.80, 127,999.20 and 54,190.40

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Solution

The fourth proportional to 85,332.80, 127,999.20 and 54,190.40 is: 81,285.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,332.80 : 127,999.20 = 54,190.40 : x
  2. Step 2: Convert to fraction form
    85,332.80/127,999.20 = 54,190.40/x
  3. Step 3: Cross multiply
    85,332.80x = 127,999.20 × 54,190.40
  4. Step 4: Simplify right side
    85,332.80x = 6,936,327,847.68
  5. Step 5: Solve for x
    x = 6,936,327,847.68/85,332.80
  6. Step 6: Final answer
    x = 81,285.60

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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.