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Finding the Fourth Proportional to 143,393.86, 215,090.76 and 68,286.28

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Solution

The fourth proportional to 143,393.86, 215,090.76 and 68,286.28 is: 102,429.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,393.86 : 215,090.76 = 68,286.28 : x
  2. Step 2: Convert to fraction form
    143,393.86/215,090.76 = 68,286.28/x
  3. Step 3: Cross multiply
    143,393.86x = 215,090.76 × 68,286.28
  4. Step 4: Simplify right side
    143,393.86x = 14,687,747,862.77
  5. Step 5: Solve for x
    x = 14,687,747,862.77/143,393.86
  6. Step 6: Final answer
    x = 102,429.41

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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.