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Finding the Fourth Proportional to 158,553.36, 218,801.97 and 86,933.21

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Solution

The fourth proportional to 158,553.36, 218,801.97 and 86,933.21 is: 119,966.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,553.36 : 218,801.97 = 86,933.21 : x
  2. Step 2: Convert to fraction form
    158,553.36/218,801.97 = 86,933.21/x
  3. Step 3: Cross multiply
    158,553.36x = 218,801.97 × 86,933.21
  4. Step 4: Simplify right side
    158,553.36x = 19,021,156,512.41
  5. Step 5: Solve for x
    x = 19,021,156,512.41/158,553.36
  6. Step 6: Final answer
    x = 119,966.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.