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Finding the Fourth Proportional to 68,572.22, 102,821.35 and 31,111.86

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Solution

The fourth proportional to 68,572.22, 102,821.35 and 31,111.86 is: 46,651.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,572.22 : 102,821.35 = 31,111.86 : x
  2. Step 2: Convert to fraction form
    68,572.22/102,821.35 = 31,111.86/x
  3. Step 3: Cross multiply
    68,572.22x = 102,821.35 × 31,111.86
  4. Step 4: Simplify right side
    68,572.22x = 3,198,963,446.21
  5. Step 5: Solve for x
    x = 3,198,963,446.21/68,572.22
  6. Step 6: Final answer
    x = 46,651.01

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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.