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Finding the Fourth Proportional to 206,115, 309,058.90 and 63,920.92

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Solution

The fourth proportional to 206,115, 309,058.90 and 63,920.92 is: 95,846.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,115 : 309,058.90 = 63,920.92 : x
  2. Step 2: Convert to fraction form
    206,115/309,058.90 = 63,920.92/x
  3. Step 3: Cross multiply
    206,115x = 309,058.90 × 63,920.92
  4. Step 4: Simplify right side
    206,115x = 19,755,329,222.19
  5. Step 5: Solve for x
    x = 19,755,329,222.19/206,115
  6. Step 6: Final answer
    x = 95,846.15

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1.5x scale

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.