Home / 129,873.72-179,195.28-78,885.03

Finding the Fourth Proportional to 129,873.72, 179,195.28 and 78,885.03

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Solution

The fourth proportional to 129,873.72, 179,195.28 and 78,885.03 is: 108,842.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,873.72 : 179,195.28 = 78,885.03 : x
  2. Step 2: Convert to fraction form
    129,873.72/179,195.28 = 78,885.03/x
  3. Step 3: Cross multiply
    129,873.72x = 179,195.28 × 78,885.03
  4. Step 4: Simplify right side
    129,873.72x = 14,135,825,038.66
  5. Step 5: Solve for x
    x = 14,135,825,038.66/129,873.72
  6. Step 6: Final answer
    x = 108,842.84

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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.