Home / 85,512.10-128,304.60-53,946.40

Finding the Fourth Proportional to 85,512.10, 128,304.60 and 53,946.40

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Solution

The fourth proportional to 85,512.10, 128,304.60 and 53,946.40 is: 80,942.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,512.10 : 128,304.60 = 53,946.40 : x
  2. Step 2: Convert to fraction form
    85,512.10/128,304.60 = 53,946.40/x
  3. Step 3: Cross multiply
    85,512.10x = 128,304.60 × 53,946.40
  4. Step 4: Simplify right side
    85,512.10x = 6,921,571,273.44
  5. Step 5: Solve for x
    x = 6,921,571,273.44/85,512.10
  6. Step 6: Final answer
    x = 80,942.59

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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.