Home / 129,056.94-178,163.33-80,685.74

Finding the Fourth Proportional to 129,056.94, 178,163.33 and 80,685.74

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Solution

The fourth proportional to 129,056.94, 178,163.33 and 80,685.74 is: 111,386.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,056.94 : 178,163.33 = 80,685.74 : x
  2. Step 2: Convert to fraction form
    129,056.94/178,163.33 = 80,685.74/x
  3. Step 3: Cross multiply
    129,056.94x = 178,163.33 × 80,685.74
  4. Step 4: Simplify right side
    129,056.94x = 14,375,240,163.89
  5. Step 5: Solve for x
    x = 14,375,240,163.89/129,056.94
  6. Step 6: Final answer
    x = 111,386.80

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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.