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Finding the Fourth Proportional to 158,015.12, 218,059.36 and 86,394.38

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Solution

The fourth proportional to 158,015.12, 218,059.36 and 86,394.38 is: 119,223.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,015.12 : 218,059.36 = 86,394.38 : x
  2. Step 2: Convert to fraction form
    158,015.12/218,059.36 = 86,394.38/x
  3. Step 3: Cross multiply
    158,015.12x = 218,059.36 × 86,394.38
  4. Step 4: Simplify right side
    158,015.12x = 18,839,102,120.10
  5. Step 5: Solve for x
    x = 18,839,102,120.10/158,015.12
  6. Step 6: Final answer
    x = 119,223.42

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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.