Home / 85,691.20-128,536.80-83,941.60

Finding the Fourth Proportional to 85,691.20, 128,536.80 and 83,941.60

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Solution

The fourth proportional to 85,691.20, 128,536.80 and 83,941.60 is: 125,912.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,691.20 : 128,536.80 = 83,941.60 : x
  2. Step 2: Convert to fraction form
    85,691.20/128,536.80 = 83,941.60/x
  3. Step 3: Cross multiply
    85,691.20x = 128,536.80 × 83,941.60
  4. Step 4: Simplify right side
    85,691.20x = 10,789,584,650.88
  5. Step 5: Solve for x
    x = 10,789,584,650.88/85,691.20
  6. Step 6: Final answer
    x = 125,912.40

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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.