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Finding the Fourth Proportional to 158,544.78, 218,791.73 and 86,923.28

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Solution

The fourth proportional to 158,544.78, 218,791.73 and 86,923.28 is: 119,954.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,544.78 : 218,791.73 = 86,923.28 : x
  2. Step 2: Convert to fraction form
    158,544.78/218,791.73 = 86,923.28/x
  3. Step 3: Cross multiply
    158,544.78x = 218,791.73 × 86,923.28
  4. Step 4: Simplify right side
    158,544.78x = 19,018,093,279.90
  5. Step 5: Solve for x
    x = 19,018,093,279.90/158,544.78
  6. Step 6: Final answer
    x = 119,954.08

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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.