Home / 129,897.46-179,239.27-78,883.66

Finding the Fourth Proportional to 129,897.46, 179,239.27 and 78,883.66

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Solution

The fourth proportional to 129,897.46, 179,239.27 and 78,883.66 is: 108,847.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,897.46 : 179,239.27 = 78,883.66 : x
  2. Step 2: Convert to fraction form
    129,897.46/179,239.27 = 78,883.66/x
  3. Step 3: Cross multiply
    129,897.46x = 179,239.27 × 78,883.66
  4. Step 4: Simplify right side
    129,897.46x = 14,139,049,633.33
  5. Step 5: Solve for x
    x = 14,139,049,633.33/129,897.46
  6. Step 6: Final answer
    x = 108,847.78

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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.