Home / 129,860.50-179,221.26-76,190.72

Finding the Fourth Proportional to 129,860.50, 179,221.26 and 76,190.72

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Solution

The fourth proportional to 129,860.50, 179,221.26 and 76,190.72 is: 105,151.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,860.50 : 179,221.26 = 76,190.72 : x
  2. Step 2: Convert to fraction form
    129,860.50/179,221.26 = 76,190.72/x
  3. Step 3: Cross multiply
    129,860.50x = 179,221.26 × 76,190.72
  4. Step 4: Simplify right side
    129,860.50x = 13,654,996,838.71
  5. Step 5: Solve for x
    x = 13,654,996,838.71/129,860.50
  6. Step 6: Final answer
    x = 105,151.27

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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.