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Finding the Fourth Proportional to 129,787, 179,106.06 and 70,171

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Solution

The fourth proportional to 129,787, 179,106.06 and 70,171 is: 96,835.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,787 : 179,106.06 = 70,171 : x
  2. Step 2: Convert to fraction form
    129,787/179,106.06 = 70,171/x
  3. Step 3: Cross multiply
    129,787x = 179,106.06 × 70,171
  4. Step 4: Simplify right side
    129,787x = 12,568,051,336.26
  5. Step 5: Solve for x
    x = 12,568,051,336.26/129,787
  6. Step 6: Final answer
    x = 96,835.98

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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.