Home / 77,027.20-115,540.80-66,659.20

Finding the Fourth Proportional to 77,027.20, 115,540.80 and 66,659.20

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Solution

The fourth proportional to 77,027.20, 115,540.80 and 66,659.20 is: 99,988.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,027.20 : 115,540.80 = 66,659.20 : x
  2. Step 2: Convert to fraction form
    77,027.20/115,540.80 = 66,659.20/x
  3. Step 3: Cross multiply
    77,027.20x = 115,540.80 × 66,659.20
  4. Step 4: Simplify right side
    77,027.20x = 7,701,857,295.36
  5. Step 5: Solve for x
    x = 7,701,857,295.36/77,027.20
  6. Step 6: Final answer
    x = 99,988.80

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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.