Home / 129,808.12-179,137.54-76,131.86

Finding the Fourth Proportional to 129,808.12, 179,137.54 and 76,131.86

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Solution

The fourth proportional to 129,808.12, 179,137.54 and 76,131.86 is: 105,063.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,808.12 : 179,137.54 = 76,131.86 : x
  2. Step 2: Convert to fraction form
    129,808.12/179,137.54 = 76,131.86/x
  3. Step 3: Cross multiply
    129,808.12x = 179,137.54 × 76,131.86
  4. Step 4: Simplify right side
    129,808.12x = 13,638,074,116.02
  5. Step 5: Solve for x
    x = 13,638,074,116.02/129,808.12
  6. Step 6: Final answer
    x = 105,063.34

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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.