Home / 129,789.39-179,109.46-76,074.40

Finding the Fourth Proportional to 129,789.39, 179,109.46 and 76,074.40

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Solution

The fourth proportional to 129,789.39, 179,109.46 and 76,074.40 is: 104,982.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,789.39 : 179,109.46 = 76,074.40 : x
  2. Step 2: Convert to fraction form
    129,789.39/179,109.46 = 76,074.40/x
  3. Step 3: Cross multiply
    129,789.39x = 179,109.46 × 76,074.40
  4. Step 4: Simplify right side
    129,789.39x = 13,625,644,703.82
  5. Step 5: Solve for x
    x = 13,625,644,703.82/129,789.39
  6. Step 6: Final answer
    x = 104,982.73

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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.