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Finding the Fourth Proportional to 119,352.79, 178,990.86 and 39,372.78

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Solution

The fourth proportional to 119,352.79, 178,990.86 and 39,372.78 is: 59,046.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,352.79 : 178,990.86 = 39,372.78 : x
  2. Step 2: Convert to fraction form
    119,352.79/178,990.86 = 39,372.78/x
  3. Step 3: Cross multiply
    119,352.79x = 178,990.86 × 39,372.78
  4. Step 4: Simplify right side
    119,352.79x = 7,047,368,571.65
  5. Step 5: Solve for x
    x = 7,047,368,571.65/119,352.79
  6. Step 6: Final answer
    x = 59,046.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.