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Finding the Fourth Proportional to 158,553.18, 218,801.72 and 86,933.03

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Solution

The fourth proportional to 158,553.18, 218,801.72 and 86,933.03 is: 119,966.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,553.18 : 218,801.72 = 86,933.03 : x
  2. Step 2: Convert to fraction form
    158,553.18/218,801.72 = 86,933.03/x
  3. Step 3: Cross multiply
    158,553.18x = 218,801.72 × 86,933.03
  4. Step 4: Simplify right side
    158,553.18x = 19,021,094,960.14
  5. Step 5: Solve for x
    x = 19,021,094,960.14/158,553.18
  6. Step 6: Final answer
    x = 119,966.66

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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.