Home / 102,613.20-141,665.07-78,222.66

Finding the Fourth Proportional to 102,613.20, 141,665.07 and 78,222.66

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Solution

The fourth proportional to 102,613.20, 141,665.07 and 78,222.66 is: 107,992.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,613.20 : 141,665.07 = 78,222.66 : x
  2. Step 2: Convert to fraction form
    102,613.20/141,665.07 = 78,222.66/x
  3. Step 3: Cross multiply
    102,613.20x = 141,665.07 × 78,222.66
  4. Step 4: Simplify right side
    102,613.20x = 11,081,418,604.49
  5. Step 5: Solve for x
    x = 11,081,418,604.49/102,613.20
  6. Step 6: Final answer
    x = 107,992.14

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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.