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Finding the Fourth Proportional to 119,872.80, 178,920.27 and 103,790.43

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Solution

The fourth proportional to 119,872.80, 178,920.27 and 103,790.43 is: 154,915.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,872.80 : 178,920.27 = 103,790.43 : x
  2. Step 2: Convert to fraction form
    119,872.80/178,920.27 = 103,790.43/x
  3. Step 3: Cross multiply
    119,872.80x = 178,920.27 × 103,790.43
  4. Step 4: Simplify right side
    119,872.80x = 18,570,211,759.02
  5. Step 5: Solve for x
    x = 18,570,211,759.02/119,872.80
  6. Step 6: Final answer
    x = 154,915.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.