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Finding the Fourth Proportional to 129,717, 179,009.70 and 70,101

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Solution

The fourth proportional to 129,717, 179,009.70 and 70,101 is: 96,739.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,717 : 179,009.70 = 70,101 : x
  2. Step 2: Convert to fraction form
    129,717/179,009.70 = 70,101/x
  3. Step 3: Cross multiply
    129,717x = 179,009.70 × 70,101
  4. Step 4: Simplify right side
    129,717x = 12,548,758,979.70
  5. Step 5: Solve for x
    x = 12,548,758,979.70/129,717
  6. Step 6: Final answer
    x = 96,739.51

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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.