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Finding the Fourth Proportional to 143,651.10, 215,513.70 and 68,828.97

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Solution

The fourth proportional to 143,651.10, 215,513.70 and 68,828.97 is: 103,261.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,651.10 : 215,513.70 = 68,828.97 : x
  2. Step 2: Convert to fraction form
    143,651.10/215,513.70 = 68,828.97/x
  3. Step 3: Cross multiply
    143,651.10x = 215,513.70 × 68,828.97
  4. Step 4: Simplify right side
    143,651.10x = 14,833,585,991.89
  5. Step 5: Solve for x
    x = 14,833,585,991.89/143,651.10
  6. Step 6: Final answer
    x = 103,261.21

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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.