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Finding the Fourth Proportional to 208,003.62, 312,045.89 and 79,910.57

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Solution

The fourth proportional to 208,003.62, 312,045.89 and 79,910.57 is: 119,881.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,003.62 : 312,045.89 = 79,910.57 : x
  2. Step 2: Convert to fraction form
    208,003.62/312,045.89 = 79,910.57/x
  3. Step 3: Cross multiply
    208,003.62x = 312,045.89 × 79,910.57
  4. Step 4: Simplify right side
    208,003.62x = 24,935,765,316.62
  5. Step 5: Solve for x
    x = 24,935,765,316.62/208,003.62
  6. Step 6: Final answer
    x = 119,881.40

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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.