Home / 78,069.66-117,221.13-76,903.26

Finding the Fourth Proportional to 78,069.66, 117,221.13 and 76,903.26

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Solution

The fourth proportional to 78,069.66, 117,221.13 and 76,903.26 is: 115,469.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,069.66 : 117,221.13 = 76,903.26 : x
  2. Step 2: Convert to fraction form
    78,069.66/117,221.13 = 76,903.26/x
  3. Step 3: Cross multiply
    78,069.66x = 117,221.13 × 76,903.26
  4. Step 4: Simplify right side
    78,069.66x = 9,014,687,037.88
  5. Step 5: Solve for x
    x = 9,014,687,037.88/78,069.66
  6. Step 6: Final answer
    x = 115,469.79

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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.