Home / 129,934.80-179,291.88-72,571.68

Finding the Fourth Proportional to 129,934.80, 179,291.88 and 72,571.68

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Solution

The fourth proportional to 129,934.80, 179,291.88 and 72,571.68 is: 100,138.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,934.80 : 179,291.88 = 72,571.68 : x
  2. Step 2: Convert to fraction form
    129,934.80/179,291.88 = 72,571.68/x
  3. Step 3: Cross multiply
    129,934.80x = 179,291.88 × 72,571.68
  4. Step 4: Simplify right side
    129,934.80x = 13,011,512,941.96
  5. Step 5: Solve for x
    x = 13,011,512,941.96/129,934.80
  6. Step 6: Final answer
    x = 100,138.78

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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.