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Finding the Fourth Proportional to 158,394.59, 218,409.41 and 100,942.95

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Solution

The fourth proportional to 158,394.59, 218,409.41 and 100,942.95 is: 139,189.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,394.59 : 218,409.41 = 100,942.95 : x
  2. Step 2: Convert to fraction form
    158,394.59/218,409.41 = 100,942.95/x
  3. Step 3: Cross multiply
    158,394.59x = 218,409.41 × 100,942.95
  4. Step 4: Simplify right side
    158,394.59x = 22,046,890,153.16
  5. Step 5: Solve for x
    x = 22,046,890,153.16/158,394.59
  6. Step 6: Final answer
    x = 139,189.67

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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.