Home / 129,881.07-179,169.84-78,880.23

Finding the Fourth Proportional to 129,881.07, 179,169.84 and 78,880.23

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Solution

The fourth proportional to 129,881.07, 179,169.84 and 78,880.23 is: 108,814.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,881.07 : 179,169.84 = 78,880.23 : x
  2. Step 2: Convert to fraction form
    129,881.07/179,169.84 = 78,880.23/x
  3. Step 3: Cross multiply
    129,881.07x = 179,169.84 × 78,880.23
  4. Step 4: Simplify right side
    129,881.07x = 14,132,958,188.26
  5. Step 5: Solve for x
    x = 14,132,958,188.26/129,881.07
  6. Step 6: Final answer
    x = 108,814.61

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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.