Home / 129,529.47-178,687.53-83,576.64

Finding the Fourth Proportional to 129,529.47, 178,687.53 and 83,576.64

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Solution

The fourth proportional to 129,529.47, 178,687.53 and 83,576.64 is: 115,295.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,529.47 : 178,687.53 = 83,576.64 : x
  2. Step 2: Convert to fraction form
    129,529.47/178,687.53 = 83,576.64/x
  3. Step 3: Cross multiply
    129,529.47x = 178,687.53 × 83,576.64
  4. Step 4: Simplify right side
    129,529.47x = 14,934,103,367.30
  5. Step 5: Solve for x
    x = 14,934,103,367.30/129,529.47
  6. Step 6: Final answer
    x = 115,295.02

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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.