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Finding the Fourth Proportional to 143,374.51, 215,053.53 and 68,546.31

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Solution

The fourth proportional to 143,374.51, 215,053.53 and 68,546.31 is: 102,815.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,374.51 : 215,053.53 = 68,546.31 : x
  2. Step 2: Convert to fraction form
    143,374.51/215,053.53 = 68,546.31/x
  3. Step 3: Cross multiply
    143,374.51x = 215,053.53 × 68,546.31
  4. Step 4: Simplify right side
    143,374.51x = 14,741,125,933.97
  5. Step 5: Solve for x
    x = 14,741,125,933.97/143,374.51
  6. Step 6: Final answer
    x = 102,815.53

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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.