Home / 208,003.03-311,392.18-128,862.79

Finding the Fourth Proportional to 208,003.03, 311,392.18 and 128,862.79

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Solution

The fourth proportional to 208,003.03, 311,392.18 and 128,862.79 is: 192,914.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,003.03 : 311,392.18 = 128,862.79 : x
  2. Step 2: Convert to fraction form
    208,003.03/311,392.18 = 128,862.79/x
  3. Step 3: Cross multiply
    208,003.03x = 311,392.18 × 128,862.79
  4. Step 4: Simplify right side
    208,003.03x = 40,126,865,098.98
  5. Step 5: Solve for x
    x = 40,126,865,098.98/208,003.03
  6. Step 6: Final answer
    x = 192,914.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.