Home / 129,165.81-178,309.35-86,217.85

Finding the Fourth Proportional to 129,165.81, 178,309.35 and 86,217.85

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Solution

The fourth proportional to 129,165.81, 178,309.35 and 86,217.85 is: 119,021.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,165.81 : 178,309.35 = 86,217.85 : x
  2. Step 2: Convert to fraction form
    129,165.81/178,309.35 = 86,217.85/x
  3. Step 3: Cross multiply
    129,165.81x = 178,309.35 × 86,217.85
  4. Step 4: Simplify right side
    129,165.81x = 15,373,449,014.78
  5. Step 5: Solve for x
    x = 15,373,449,014.78/129,165.81
  6. Step 6: Final answer
    x = 119,021.04

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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.