Home / 85,728.20-128,610.68-43,614.16

Finding the Fourth Proportional to 85,728.20, 128,610.68 and 43,614.16

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Solution

The fourth proportional to 85,728.20, 128,610.68 and 43,614.16 is: 65,430.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,728.20 : 128,610.68 = 43,614.16 : x
  2. Step 2: Convert to fraction form
    85,728.20/128,610.68 = 43,614.16/x
  3. Step 3: Cross multiply
    85,728.20x = 128,610.68 × 43,614.16
  4. Step 4: Simplify right side
    85,728.20x = 5,609,246,775.23
  5. Step 5: Solve for x
    x = 5,609,246,775.23/85,728.20
  6. Step 6: Final answer
    x = 65,430.59

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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.