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Finding the Fourth Proportional to 129,785.68, 179,106.84 and 73,186

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Solution

The fourth proportional to 129,785.68, 179,106.84 and 73,186 is: 100,998.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,785.68 : 179,106.84 = 73,186 : x
  2. Step 2: Convert to fraction form
    129,785.68/179,106.84 = 73,186/x
  3. Step 3: Cross multiply
    129,785.68x = 179,106.84 × 73,186
  4. Step 4: Simplify right side
    129,785.68x = 13,108,113,192.24
  5. Step 5: Solve for x
    x = 13,108,113,192.24/129,785.68
  6. Step 6: Final answer
    x = 100,998.15

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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.