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Finding the Fourth Proportional to 129,810, 179,137.81 and 70,194

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Solution

The fourth proportional to 129,810, 179,137.81 and 70,194 is: 96,867.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,810 : 179,137.81 = 70,194 : x
  2. Step 2: Convert to fraction form
    129,810/179,137.81 = 70,194/x
  3. Step 3: Cross multiply
    129,810x = 179,137.81 × 70,194
  4. Step 4: Simplify right side
    129,810x = 12,574,399,435.14
  5. Step 5: Solve for x
    x = 12,574,399,435.14/129,810
  6. Step 6: Final answer
    x = 96,867.73

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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.