Home / 129,855.36-179,294.40-85,272.96

Finding the Fourth Proportional to 129,855.36, 179,294.40 and 85,272.96

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Solution

The fourth proportional to 129,855.36, 179,294.40 and 85,272.96 is: 117,738.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,855.36 : 179,294.40 = 85,272.96 : x
  2. Step 2: Convert to fraction form
    129,855.36/179,294.40 = 85,272.96/x
  3. Step 3: Cross multiply
    129,855.36x = 179,294.40 × 85,272.96
  4. Step 4: Simplify right side
    129,855.36x = 15,288,964,199.42
  5. Step 5: Solve for x
    x = 15,288,964,199.42/129,855.36
  6. Step 6: Final answer
    x = 117,738.41

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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.