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Finding the Fourth Proportional to 142,383.76, 213,963.63 and 75,871.42

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Solution

The fourth proportional to 142,383.76, 213,963.63 and 75,871.42 is: 114,013.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,383.76 : 213,963.63 = 75,871.42 : x
  2. Step 2: Convert to fraction form
    142,383.76/213,963.63 = 75,871.42/x
  3. Step 3: Cross multiply
    142,383.76x = 213,963.63 × 75,871.42
  4. Step 4: Simplify right side
    142,383.76x = 16,233,723,617.03
  5. Step 5: Solve for x
    x = 16,233,723,617.03/142,383.76
  6. Step 6: Final answer
    x = 114,013.87

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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.