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Finding the Fourth Proportional to 158,418.89, 218,618.02 and 86,801.63

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Solution

The fourth proportional to 158,418.89, 218,618.02 and 86,801.63 is: 119,786.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,418.89 : 218,618.02 = 86,801.63 : x
  2. Step 2: Convert to fraction form
    158,418.89/218,618.02 = 86,801.63/x
  3. Step 3: Cross multiply
    158,418.89x = 218,618.02 × 86,801.63
  4. Step 4: Simplify right side
    158,418.89x = 18,976,400,483.37
  5. Step 5: Solve for x
    x = 18,976,400,483.37/158,418.89
  6. Step 6: Final answer
    x = 119,786.22

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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.