Home / 129,106.13-178,200.30-72,535.73

Finding the Fourth Proportional to 129,106.13, 178,200.30 and 72,535.73

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Solution

The fourth proportional to 129,106.13, 178,200.30 and 72,535.73 is: 100,118.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,106.13 : 178,200.30 = 72,535.73 : x
  2. Step 2: Convert to fraction form
    129,106.13/178,200.30 = 72,535.73/x
  3. Step 3: Cross multiply
    129,106.13x = 178,200.30 × 72,535.73
  4. Step 4: Simplify right side
    129,106.13x = 12,925,888,846.72
  5. Step 5: Solve for x
    x = 12,925,888,846.72/129,106.13
  6. Step 6: Final answer
    x = 100,118.32

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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.