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Finding the Fourth Proportional to 158,369.07, 218,549.37 and 86,751.68

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Solution

The fourth proportional to 158,369.07, 218,549.37 and 86,751.68 is: 119,717.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,369.07 : 218,549.37 = 86,751.68 : x
  2. Step 2: Convert to fraction form
    158,369.07/218,549.37 = 86,751.68/x
  3. Step 3: Cross multiply
    158,369.07x = 218,549.37 × 86,751.68
  4. Step 4: Simplify right side
    158,369.07x = 18,959,524,243.01
  5. Step 5: Solve for x
    x = 18,959,524,243.01/158,369.07
  6. Step 6: Final answer
    x = 119,717.34

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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.