Home / 214,429.10-321,690.42-81,310.66

Finding the Fourth Proportional to 214,429.10, 321,690.42 and 81,310.66

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Solution

The fourth proportional to 214,429.10, 321,690.42 and 81,310.66 is: 121,983.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,429.10 : 321,690.42 = 81,310.66 : x
  2. Step 2: Convert to fraction form
    214,429.10/321,690.42 = 81,310.66/x
  3. Step 3: Cross multiply
    214,429.10x = 321,690.42 × 81,310.66
  4. Step 4: Simplify right side
    214,429.10x = 26,156,859,561.65
  5. Step 5: Solve for x
    x = 26,156,859,561.65/214,429.10
  6. Step 6: Final answer
    x = 121,983.72

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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.