Home / 77,660.08-107,105-65,619.64

Finding the Fourth Proportional to 77,660.08, 107,105 and 65,619.64

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Solution

The fourth proportional to 77,660.08, 107,105 and 65,619.64 is: 90,499.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,660.08 : 107,105 = 65,619.64 : x
  2. Step 2: Convert to fraction form
    77,660.08/107,105 = 65,619.64/x
  3. Step 3: Cross multiply
    77,660.08x = 107,105 × 65,619.64
  4. Step 4: Simplify right side
    77,660.08x = 7,028,191,542.20
  5. Step 5: Solve for x
    x = 7,028,191,542.20/77,660.08
  6. Step 6: Final answer
    x = 90,499.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.